Nume: Keisuke Saitoh
Ţara: Japonia
Data naşterii: 29.04.01, 25 Vârsta
Clasament ATP: 691
TOP poziţie în clasament: 552 (05.05.25, 66 puncte)
Puncte: 48
Premii: 59927 $
Total meciuri: 325
Victorii: 182
Succes: 56 %
Ţara: Japonia
Data naşterii: 29.04.01, 25 Vârsta
Clasament ATP: 691
TOP poziţie în clasament: 552 (05.05.25, 66 puncte)
Puncte: 48
Premii: 59927 $
Total meciuri: 325
Victorii: 182
Succes: 56 %
| an | sumar | Hard | Zgura | In. Hard | Carpet | Iarbă | Acryl |
| 2026 | 20/11 | 19/9 | 0/0 | 1/2 | 0/0 | 0/0 | 0/0 |
| 2025 | 21/26 | 17/23 | 0/0 | 3/2 | 0/0 | 1/1 | 0/0 |
| 2024 | 46/24 | 39/17 | 7/6 | 0/1 | 0/0 | 0/0 | 0/0 |
| 2023 | 17/27 | 14/23 | 3/4 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2022 | 29/21 | 25/17 | 4/3 | 0/1 | 0/0 | 0/0 | 0/0 |
| 2021 | 35/19 | 20/9 | 15/10 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2020 | 6/4 | 6/4 | 0/0 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2019 | 8/11 | 4/8 | 2/1 | 0/0 | 2/1 | 0/1 | 0/0 |
| ÎN TOTAL | 182/143 | 144/110 | 31/24 | 4/6 | 2/1 | 1/2 | 0/0 |
| succes % | 56 % | 56.69 % | 56.36 % | 40 % | 66.67 % | 33.33 % | 0 % |
Keisuke Saitoh / nejucate / ultimele
| nu a fost găsit nici un meci |
Keisuke Saitoh form / suprafaţa: Hard
Keisuke Saitoh / suprafaţa: Hard
| 29.05.26 | Sfert de finală | Alan Magadan | Keisuke Saitoh | 3-6, 6-3, 6-4 |  | detaliu meci |  M15 Gimcheon | Hard |
| 28.05.26 | a 2-a rundă | Keisuke Saitoh | Tai Sach | 7-5, 6-0 |  | detaliu meci | ||
| 27.05.26 | 1-a rundă | Keisuke Saitoh | Hyung Tak Oh | 6-4, 3-6, 7-5 | | detaliu meci | ||
| 22.05.26 | Sfert de finală | Dong Ju Kim | Keisuke Saitoh | 6-2, 7-65 | | detaliu meci | M15 Gimcheon | Hard |
| 21.05.26 | a 2-a rundă | Keisuke Saitoh | Hunter Heck | 6-1, 6-1 | | detaliu meci | ||
| 20.05.26 | 1-a rundă | Keisuke Saitoh | Matthew Dellavedova | 7-62, 6-3 | | detaliu meci | ||
| 17.05.26 | Finală | Keisuke Saitoh | Hoyoung Roh | 6-4, 6-1 | | detaliu meci | M15 Andong | Hard |
| 16.05.26 | Semifinală | Keisuke Saitoh | Woobin Shin | 6-4, 5-7, 7-5 | | detaliu meci | ||
| 15.05.26 | Sfert de finală | Keisuke Saitoh | Sanhui Shin | 6-3, 2-6, 6-4 | | detaliu meci | ||
| 14.05.26 | a 2-a rundă | Keisuke Saitoh | Shinji Hazawa | 6-3, 6-1 | | detaliu meci | ||
| 13.05.26 | 1-a rundă | Keisuke Saitoh | Ko Suzuki | 6-3, 6-1 | | detaliu meci | ||
| 02.04.26 | a 2-a rundă | Chase Ferguson | Keisuke Saitoh | 6-4, 6-3 | | detaliu meci |  M15 Kashiwa | Hard |
| 31.03.26 | 1-a rundă | Keisuke Saitoh | Noah Zamora | 6-3, 6-3 | | detaliu meci | ||
| 24.03.26 | 1-a rundă | Emile Hudd | Keisuke Saitoh | 6-3, 7-67 | | detaliu meci | M15 Tsukuba | Hard |
| 05.03.26 | a 2-a rundă | Li Tu | Keisuke Saitoh | 6-1, 6-4 | | detaliu meci |  M25 Launceston | Hard |
| 04.03.26 | 1-a rundă | Keisuke Saitoh | Joshua Charlton | 6-3, 7-5 | | detaliu meci | ||
| 27.02.26 | Sfert de finală | Enzo Aguiard | Keisuke Saitoh | 6-3, 6-1 | | detaliu meci | M25 Burnie | Hard |
| 26.02.26 | a 2-a rundă | Keisuke Saitoh | Tai Sach | 6-4, 7-5 | | detaliu meci | ||
| 25.02.26 | 1-a rundă | Keisuke Saitoh | Zachary Adam-Gedge | 6-3, 6-3 | | detaliu meci | ||
| 30.01.26 | Sfert de finală | Oleksandr Ovcharenko | Keisuke Saitoh | 7-62, 7-5 | | detaliu meci |  M15 Monastir | Hard |
| 29.01.26 | a 2-a rundă | Keisuke Saitoh | Luca Castagnola | 4-6, 7-5, 7-5 | | detaliu meci | ||
| 28.01.26 | 1-a rundă | Keisuke Saitoh | Toufik Sahtali | 6-0, 6-1 | | detaliu meci | ||
| 23.01.26 | a 2-a rundă | Dimitris Sakellaridis | Keisuke Saitoh | 6-1, 6-4 | | detaliu meci | M15 Monastir | Hard |
| 22.01.26 | 1-a rundă | Keisuke Saitoh | Petr Nesterov | 6-4, 4-6, 7-65 | | detaliu meci | ||
| 17.01.26 | Semifinală | Lukas Pokorny | Keisuke Saitoh | 6-0, 6-4 | | detaliu meci | M25 Monastir | Hard |
| 17.01.26 | Sfert de finală | Keisuke Saitoh | Dimitris Sakellaridis | 6-3, 6-4 | | detaliu meci | ||
| 15.01.26 | a 2-a rundă | Keisuke Saitoh | Egor Agafonov | 7-5, 7-5 | | detaliu meci | ||
| 14.01.26 | 1-a rundă | Keisuke Saitoh | Tomas Antonio Serrano Luis | 6-2, 6-3 | | detaliu meci | ||
| 28.11.25 | Sfert de finală | Geun Jun Kim | Keisuke Saitoh | 6-4, 6-2 | | detaliu meci | M15 Gimcheon | Hard |
| 27.11.25 | a 2-a rundă | Keisuke Saitoh | Woong Bi Lee | 7-65, 6-3 | | detaliu meci | ||
| 26.11.25 | 1-a rundă | Keisuke Saitoh | Dong Ju Kim | 6-76, 6-4, 7-67 | | detaliu meci | ||
| 21.11.25 | Sfert de finală | Theodore Dean | Keisuke Saitoh | 6-1, 6-0 | | detaliu meci | M15 Gimcheon | Hard |
| 20.11.25 | a 2-a rundă | Keisuke Saitoh | Yunseok Jang | 6-1, 6-2 | | detaliu meci | ||
| 18.11.25 | 1-a rundă | Keisuke Saitoh | Ko Suzuki | 6-1, 6-2 | | detaliu meci | ||
| 02.11.25 | 1-a rundă de calif. | Koki Matsuda | Keisuke Saitoh | 7-5, 5-7, 6-4 | | detaliu meci | Matsuyama Challenger | Hard |
| 01.11.25 | Semifinală | Moerani Bouzige | Keisuke Saitoh | 7-66, 6-4 | | detaliu meci | M15 Yanagawa | Hard |
| 31.10.25 | Sfert de finală | Keisuke Saitoh | Yuta Kawahashi | 4-6, 6-4, 6-2 | | detaliu meci | ||
| 30.10.25 | a 2-a rundă | Keisuke Saitoh | Shu Muto | 6-2, 6-2 | | detaliu meci | ||
| 28.10.25 | 1-a rundă | Keisuke Saitoh | Geun Jun Kim | 4-6, 6-1, 6-3 | | detaliu meci | ||
| 18.09.25 | a 2-a rundă | Yusuke Takahashi | Keisuke Saitoh | 7-61, 6-0 | | detaliu meci | M25 Takasaki | Hard |
| 17.09.25 | 1-a rundă | Keisuke Saitoh | Koki Matsuda | 6-3, 4-6, 6-2 | | detaliu meci | ||
| 10.09.25 | 1-a rundă | Masamichi Imamura | Keisuke Saitoh | 6-3, 6-3 | | detaliu meci | M25 Sapporo | Hard |
| 02.09.25 | 1-a rundă | Naoki Nakagawa | Keisuke Saitoh | 6-4, 6-4 | | detaliu meci | M25 Sapporo | Hard |
| 28.08.25 | a 2-a rundă | Soon-Woo Kwon | Keisuke Saitoh | 6-2, 6-0 | | detaliu meci | .png){kind=small} M25 Taipei | Hard |
| 27.08.25 | 1-a rundă | Keisuke Saitoh | Yong Joon Park | 6-2, 6-2 | | detaliu meci | ||
| 19.08.25 | 1-a rundă | Masamichi Imamura | Keisuke Saitoh | 6-3, 6-4 | | detaliu meci | M25 Taipei | Hard |
| 14.07.25 | 1-a rundă de calif. | Andres Martin | Keisuke Saitoh | 6-1, 7-5 | | detaliu meci |  Granby Challenger | Hard |
| 01.07.25 | 1-a rundă | Daniel Milavsky | Keisuke Saitoh | 6-2, 6-4 | | detaliu meci | M25 Laval | Hard |
| 01.06.25 | 1-a rundă de calif. | Yibing Wu | Keisuke Saitoh | 6-1, 6-3 | | detaliu meci |  Tyler Challenger | Hard |
| 25.05.25 | 1-a rundă de calif. | Hyeon Chung | Keisuke Saitoh | 6-0, 6-2 | | detaliu meci | Little Rock | Hard |
| 04.05.25 | 1-a rundă de calif. | Andre Ilagan | Keisuke Saitoh | 6-2, 6-2 | | detaliu meci |  Wuxi Challenger | Hard |
| 23.04.25 | 1-a rundă | Riku Takahata | Keisuke Saitoh | 6-4, 6-4 | | detaliu meci | M15 Osaka | Hard |
| 06.04.25 | Semifinală | Keisuke Saitoh | Hikaru Shiraishi | 6-75, 6-4, 7-65 | | detaliu meci | M15 Kashiwa | Hard |
| 06.04.25 | Finală | Yusuke Takahashi | Keisuke Saitoh | 6-2, 6-0 | | detaliu meci | ||
| 05.04.25 | Sfert de finală | Keisuke Saitoh | Ryotaro Matsumura | 4-6, 6-2, 6-3 | | detaliu meci | ||
| 04.04.25 | a 2-a rundă | Keisuke Saitoh | Issei Okamura | 6-2, 6-2 | | detaliu meci | ||
| 01.04.25 | 1-a rundă | Keisuke Saitoh | Ryo Tabata | 6-1, 4-6, 6-3 | | detaliu meci | ||
| 21.03.25 | Sfert de finală | Oliver Crawford | Keisuke Saitoh | 6-3, 6-2 | | detaliu meci | M25 Shenzhen | Hard |
| 20.03.25 | a 2-a rundă | Keisuke Saitoh | Jie Cui | 3-6, 5-1, Jie Cui - retragere | | detaliu meci | ||
| 18.03.25 | 1-a rundă | Keisuke Saitoh | Naoki Tajima | 6-4, 6-1 | | detaliu meci | ||
| 12.03.25 | 1-a rundă | Kaichi Uchida | Keisuke Saitoh | 3-6, 6-3, 6-2 | | detaliu meci | M25 Luan | Hard |
| 12.02.25 | 1-a rundă | Kody Pearson | Keisuke Saitoh | 6-3, 6-1 | | detaliu meci |  M25 Timaru | Hard |
| 04.02.25 | 1-a rundă | Andre Ilagan | Keisuke Saitoh | 7-5, 6-2 | | detaliu meci | Brisbane 2 | Hard |
| 03.02.25 | Calificare | Keisuke Saitoh | Thomas Braithwaite | 6-4, 6-4 | | detaliu meci | ||
| 02.02.25 | 1-a rundă de calif. | Keisuke Saitoh | Ty Host | 6-2, 6-4 | | detaliu meci | ||
| 26.01.25 | 1-a rundă de calif. | Sam Ryan Ziegann | Keisuke Saitoh | 6-2, 6-4 | | detaliu meci | Brisbane 1 | Hard |
| 05.01.25 | 1-a rundă de calif. | Jakub Paul | Keisuke Saitoh | 6-3, 6-4 | | detaliu meci |  Nonthaburi 2 | Hard |
| 31.12.24 | 1-a rundă | Shintaro Mochizuki | Keisuke Saitoh | 6-4, 6-4 | | detaliu meci |  Noumea Challenger | Hard |
| 24.12.24 | 1-a rundă | Fitriadi M Rifqi | Keisuke Saitoh | 4-6, 7-5, 6-2 | | detaliu meci |  M15 Bali | Hard |
| 25.11.24 | Calificare | Jakub Paul | Keisuke Saitoh | 7-63, 7-62 | | detaliu meci | Yokkaichi Challenger | Hard |
| 24.11.24 | 1-a rundă de calif. | Keisuke Saitoh | Ji Sung Nam | 6-1, 6-3 | | detaliu meci | ||
| 16.11.24 | 1-a rundă de calif. | Petr Bar Biryukov | Keisuke Saitoh | 7-5, 6-2 | | detaliu meci | Yokohama Challenger | Hard |
| 22.09.24 | Finală | Masamichi Imamura | Keisuke Saitoh | Keisuke Saitoh - nu s-a prezentat | | detaliu meci | M25 Takasaki | Hard |
| 21.09.24 | Semifinală | Keisuke Saitoh | Goncalo Oliveira | 5-1, Goncalo Oliveira - retragere | | detaliu meci | ||
| 20.09.24 | Sfert de finală | Keisuke Saitoh | Yusuke Takahashi | 6-3, 6-4 | | detaliu meci | ||
| 19.09.24 | a 2-a rundă | Keisuke Saitoh | Kosuke Ogura | 6-0, 1-6, 6-1 | | detaliu meci | ||
| 17.09.24 | 1-a rundă | Keisuke Saitoh | Naoya Honda | 7-65, 6-0 | | detaliu meci | ||
| 12.09.24 | a 2-a rundă | Shintaro Imai | Keisuke Saitoh | 6-2, 7-66 | | detaliu meci | M25 Sapporo | Hard |
| 10.09.24 | 1-a rundă | Keisuke Saitoh | Daisuke Sumizawa | 6-1, 6-2 | | detaliu meci | ||
| 06.09.24 | Sfert de finală | Kokoro Isomura | Keisuke Saitoh | 6-2, 6-4 | | detaliu meci | M25 Sapporo | Hard |
| 05.09.24 | a 2-a rundă | Keisuke Saitoh | Hiromasa Koyama | 6-0, 4-6, 6-3 | | detaliu meci | ||
| 04.09.24 | 1-a rundă | Keisuke Saitoh | Masamichi Imamura | 7-5, 6-2 | | detaliu meci | ||
| 07.08.24 | 1-a rundă | Tsung-Hao Huang | Keisuke Saitoh | 6-3, 6-2 | | detaliu meci | M25 Taipei | Hard |
| 04.08.24 | Finală | Keisuke Saitoh | Yu Hsiou Hsu | 6-3, 6-1 | | detaliu meci | M25 Taipei | Hard |
| 03.08.24 | Semifinală | Keisuke Saitoh | Ryotaro Taguchi | 3-6, 7-63, 7-64 | | detaliu meci | ||
| 02.08.24 | Sfert de finală | Keisuke Saitoh | Takuya Kumasaka | 6-1, 6-4 | | detaliu meci | ||
| 01.08.24 | a 2-a rundă | Keisuke Saitoh | Kokoro Isomura | 6-3, 6-4 | | detaliu meci | ||
| 31.07.24 | 1-a rundă | Keisuke Saitoh | Tomohiro Masabayashi | 6-1, 6-0 | | detaliu meci | ||
| 29.07.24 | Calificare | Keisuke Saitoh | Chen-Yu Lu | 6-3, 6-0 | | detaliu meci | ||
| 28.07.24 | 1-a rundă de calif. | Keisuke Saitoh | Nan Hsun Lin | 6-0, 6-1 | | detaliu meci | ||
| 05.04.24 | Sfert de finală | Yu Hsiou Hsu | Keisuke Saitoh | 6-3, 6-1 | | detaliu meci | M15 Kashiwa | Hard |
| 04.04.24 | a 2-a rundă | Keisuke Saitoh | Daisuke Sumizawa | 7-5, 6-2 | | detaliu meci | ||
| 03.04.24 | 1-a rundă | Keisuke Saitoh | Tsung-Hao Huang | 6-2, 6-3 | | detaliu meci | ||
| 01.04.24 | Calificare | Keisuke Saitoh | Jimmy Yang | 6-1, 6-3 | | detaliu meci | ||
| 31.03.24 | 1-a rundă de calif. | Keisuke Saitoh | Yuttana Charoenphon | 7-5, 6-2 | | detaliu meci | ||
| 27.03.24 | 1-a rundă | Jea Moon Lee | Keisuke Saitoh | 4-6, 6-1, 6-4 | | detaliu meci | M15 Tsukuba | Hard |
| 25.03.24 | Calificare | Keisuke Saitoh | Jimmy Yang | 6-3, 6-4 | | detaliu meci | ||
| 24.03.24 | 1-a rundă de calif. | Keisuke Saitoh | Yuttana Charoenphon | 6-1, 6-4 | | detaliu meci | ||
| 18.03.24 | 1-a rundă de calif. | Ko Suzuki | Keisuke Saitoh | 6-3, 6-3 | | detaliu meci | M15 Nishi | Hard |
| 14.03.24 | a 2-a rundă | Linang Xiao | Keisuke Saitoh | 6-4, 6-2 | | detaliu meci | M15 Hinode | Hard |
| 13.03.24 | 1-a rundă | Keisuke Saitoh | Sora Fukuda | 7-65, 3-6, 6-2 | | detaliu meci | ||
| 11.03.24 | 2-a rundă de calif. | Keisuke Saitoh | Ryoto Tachi | 6-3, 6-2 | | detaliu meci | ||
| 11.03.24 | Calificare | Yuta Kikuchi | Keisuke Saitoh | 0-6, 7-5, 10-3 | | detaliu meci | ||
| 10.03.24 | 1-a rundă de calif. | Keisuke Saitoh | Yusuke Kusuhara | 7-62, 3-6, 10-8 | | detaliu meci | ||
| 22.02.24 | a 2-a rundă | Adrien Gobat | Keisuke Saitoh | 6-4, 7-5 | | detaliu meci | M15 Monastir | Hard |
| 20.02.24 | 1-a rundă | Keisuke Saitoh | Louis Tessa | 6-3, 6-1 | | detaliu meci | ||
| 07.02.24 | 1-a rundă | Luca Castagnola | Keisuke Saitoh | 4-6, 6-1, 7-5 | | detaliu meci | M15 Monastir | Hard |
| 05.02.24 | 2-a rundă de calif. | Keisuke Saitoh | Dimitris Sakellaridis | 6-2, 7-5 | | detaliu meci | ||
| 05.02.24 | Calificare | Keisuke Saitoh | Mohamed Nazim Makhlouf | 6-4, 6-3 | | detaliu meci | ||
| 04.02.24 | 1-a rundă de calif. | Keisuke Saitoh | Gilberto Ravasio | 6-0, 6-2 | | detaliu meci | ||
| 25.01.24 | a 2-a rundă | Andres Fernandez Canovas | Keisuke Saitoh | 6-4, 6-1 | | detaliu meci | M15 Monastir | Hard |
| 24.01.24 | 1-a rundă | Keisuke Saitoh | Yan Bai | 6-4, 3-6, 6-1 | | detaliu meci | ||
| 22.01.24 | 2-a rundă de calif. | Keisuke Saitoh | Niccolo Ciavarella | 5-7, 6-2, 10-6 | | detaliu meci | ||
| 22.01.24 | Calificare | Keisuke Saitoh | Kylian Collignon | 6-1, 6-1 | | detaliu meci | ||
| 21.01.24 | 1-a rundă de calif. | Keisuke Saitoh | Luca Friis | 6-0, Luca Friis - retragere | | detaliu meci | ||
| 18.01.24 | a 2-a rundă | Jakub Nicod | Keisuke Saitoh | 7-5, 6-4 | | detaliu meci | M15 Monastir | Hard |
| 17.01.24 | 1-a rundă | Keisuke Saitoh | Tao Mu | Tao Mu - nu s-a prezentat | | detaliu meci | ||
| 15.01.24 | Calificare | Keisuke Saitoh | Stefan Frljanic | 6-4, 6-2 | | detaliu meci | ||
| 15.01.24 | 2-a rundă de calif. | Keisuke Saitoh | William Mclennaghan | 6-1, 6-2 | | detaliu meci | ||
| 14.01.24 | 1-a rundă de calif. | Keisuke Saitoh | Takahiro Kubo | 6-1, 6-0 | | detaliu meci | ||
| 10.01.24 | 1-a rundă | Nicola Kuhn | Keisuke Saitoh | 6-4, 6-4 | | detaliu meci | M15 Monastir | Hard |
| 08.01.24 | 2-a rundă de calif. | Keisuke Saitoh | Yuta Kikuchi | 7-65, 6-2 | | detaliu meci | ||
| 08.01.24 | Calificare | Keisuke Saitoh | Artur Kukasian | 7-5, 6-2 | | detaliu meci | ||
| 07.01.24 | 1-a rundă de calif. | Keisuke Saitoh | Leon Formella | 6-1, 6-1 | | detaliu meci | ||
| 29.12.23 | Sfert de finală | Duckhee Lee | Keisuke Saitoh | 6-3, 7-5 | | detaliu meci | M15 Yanagawa | Hard |
| 28.12.23 | a 2-a rundă | Keisuke Saitoh | Mikalai Haliak | 6-4, 6-3 | | detaliu meci | ||
| 27.12.23 | 1-a rundă | Keisuke Saitoh | Taki Adachi | 6-1, 6-1 | | detaliu meci | ||
| 20.12.23 | 1-a rundă | Linang Xiao | Keisuke Saitoh | 6-0, 6-2 | | detaliu meci | M15 Yanagawa | Hard |
| 29.11.23 | 1-a rundă | Blake Mott | Keisuke Saitoh | 6-2, 6-2 | | detaliu meci | M25 Gold | Hard |
| 23.11.23 | a 2-a rundă | Moerani Bouzige | Keisuke Saitoh | 6-4, 2-6, 7-5 | | detaliu meci | M25 Brisbane | Hard |
| 21.11.23 | 1-a rundă | Keisuke Saitoh | Thomas Fancutt | 4-6, 7-5, 6-4 | | detaliu meci | ||
| 20.09.23 | 1-a rundă | Leo Vithoontien | Keisuke Saitoh | 6-4, 6-3 | | detaliu meci | M25 Takasaki | Hard |
| 12.09.23 | 1-a rundă | Tomohiro Masabayashi | Keisuke Saitoh | 7-5, 6-3 | | detaliu meci | M25 Sapporo | Hard |
| 06.09.23 | 1-a rundă | Tomohiro Masabayashi | Keisuke Saitoh | 6-4, 3-6, 6-1 | | detaliu meci | M25 Sapporo | Hard |
| 31.08.23 | a 2-a rundă | Naoki Nakagawa | Keisuke Saitoh | 6-4, 6-71, 6-1 | | detaliu meci |  M25 Hong | Hard |
| 30.08.23 | 1-a rundă | Keisuke Saitoh | Ji Hoon Son | 6-3, 7-64 | | detaliu meci | ||
| 04.08.23 | Sfert de finală | Isaac Becroft | Keisuke Saitoh | 6-3, 6-4 | | detaliu meci | M15 Caloundra | Hard |
| 03.08.23 | a 2-a rundă | Keisuke Saitoh | Tai Sach | 6-2, 6-1 | | detaliu meci | ||
| 01.08.23 | 1-a rundă | Keisuke Saitoh | Edward Winter | 7-63, 6-2 | | detaliu meci | ||
| 27.07.23 | a 2-a rundă | Isaac Becroft | Keisuke Saitoh | 5-7, 6-2, 6-1 | | detaliu meci | M15 Caloundra | Hard |
| 25.07.23 | 1-a rundă | Keisuke Saitoh | Matthew Burton | 6-3, 6-2 | | detaliu meci | ||
| 15.06.23 | 1-a rundă | Dominik Palan | Keisuke Saitoh | 7-5, 7-64 | | detaliu meci | M25 Changwon | Hard |
| 07.06.23 | 1-a rundă | Dong Ju Kim | Keisuke Saitoh | 6-1, 6-2 | | detaliu meci | M25 Daegu | Hard |
| 08.05.23 | 1-a rundă de calif. | Luke Saville | Keisuke Saitoh | 6-3, 6-1 | | detaliu meci | Busan Challenger | Hard |
| 30.04.23 | 1-a rundă de calif. | Omar Jasika | Keisuke Saitoh | 6-0, 6-0 | | detaliu meci | Gwangju Challenger | Hard |
| 23.04.23 | 1-a rundă de calif. | Omar Jasika | Keisuke Saitoh | 6-4, 7-64 | | detaliu meci | Seoul Challenger | Hard |
| 04.04.23 | 1-a rundă | Yusuke Takahashi | Keisuke Saitoh | 6-4, 3-6, 6-3 | | detaliu meci | M25 Kashiwa | Hard |
| 28.03.23 | 1-a rundă | Tatsuma Ito | Keisuke Saitoh | 4-6, 7-5, 6-2 | | detaliu meci | M25 Tsukuba | Hard |
| 20.02.23 | 2-a rundă de calif. | Ioannis Xilas | Keisuke Saitoh | 6-3, 6-3 | | detaliu meci | M25 Monastir | Hard |
| 19.02.23 | 1-a rundă de calif. | Keisuke Saitoh | Raghav Singh Panwar | 6-1, 6-1 | | detaliu meci | ||
| 13.02.23 | 2-a rundă de calif. | Mayeul Darras | Keisuke Saitoh | 2-6, 7-66, 11-9 | | detaliu meci | M25 Monastir | Hard |
| 12.02.23 | 1-a rundă de calif. | Keisuke Saitoh | Vitali Chvets | 6-3, 6-1 | | detaliu meci | ||
| 07.02.23 | 1-a rundă | Arthur Bouquier | Keisuke Saitoh | 6-4, 6-4 | | detaliu meci | M25 Monastir | Hard |
| 02.02.23 | a 2-a rundă | Mathias Bourgue | Keisuke Saitoh | 6-4, 4-6, 6-2 | | detaliu meci | M25 Monastir | Hard |
| 01.02.23 | 1-a rundă | Keisuke Saitoh | Louis Tessa | 6-2, 4-6, 6-3 | | detaliu meci | ||
| 28.01.23 | Semifinală | Nicholas David Ionel | Keisuke Saitoh | 6-1, 7-65 | | detaliu meci | M15 Jakarta | Hard |
| 27.01.23 | Sfert de finală | Keisuke Saitoh | Mitsuki Wei Kang Leong | 6-0, 4-6, 6-1 | | detaliu meci | ||
| 26.01.23 | a 2-a rundă | Keisuke Saitoh | Taisei Ichikawa | 6-3, 3-6, 6-2 | | detaliu meci | ||
| 24.01.23 | 1-a rundă | Keisuke Saitoh | Hao Yuan Ng | 3-6, 6-3, 6-2 | | detaliu meci | ||
| 19.01.23 | a 2-a rundă | Sanhui Shin | Keisuke Saitoh | 5-7, 6-1, 6-1 | | detaliu meci | M15 Jakarta | Hard |
| 18.01.23 | 1-a rundă | Keisuke Saitoh | Ray Ho | 6-3, 6-1 | | detaliu meci | ||
| 22.11.22 | 1-a rundă | Shintaro Imai | Keisuke Saitoh | 6-4, 6-0 | | detaliu meci | Yokkaichi Challenger | Hard |
| 21.11.22 | Calificare | Keisuke Saitoh | Marc Polmans | 5-3, Marc Polmans - retragere | | detaliu meci | ||
| 20.11.22 | 1-a rundă de calif. | Keisuke Saitoh | Ryota Tanuma | 4-1, Ryota Tanuma - retragere | | detaliu meci | ||
| 06.11.22 | 1-a rundă de calif. | Mukund Sasikumar | Keisuke Saitoh | 6-3, 6-2 | | detaliu meci | Matsuyama Challenger | Hard |
| 30.10.22 | Calificare | Seongchan Hong | Keisuke Saitoh | 6-2, 7-5 | | detaliu meci | Yokohama Challenger | Hard |
| 29.10.22 | 1-a rundă de calif. | Keisuke Saitoh | Jumpei Yamasaki | 6-2, 4-2, Jumpei Yamasaki - retragere | | detaliu meci | ||
| 10.09.22 | Semifinală | Rio Noguchi | Keisuke Saitoh | 1-6, 6-3, 6-0 | | detaliu meci | M25 Sapporo | Hard |
| 09.09.22 | Sfert de finală | Keisuke Saitoh | Ryota Tanuma | 0-6, 6-4, 6-3 | | detaliu meci | ||
| 08.09.22 | a 2-a rundă | Keisuke Saitoh | Shunsuke Nakagawa | 6-1, 6-2 | | detaliu meci | ||
| 07.09.22 | 1-a rundă | Keisuke Saitoh | Kazuki Nishiwaki | 6-3, 6-2 | | detaliu meci | ||
| 30.08.22 | 1-a rundă | Daisuke Sumizawa | Keisuke Saitoh | 7-5, 3-6, 6-4 | | detaliu meci | M25 Sapporo | Hard |
| 04.08.22 | a 2-a rundă | Tsung-Hao Huang | Keisuke Saitoh | 6-1, 6-0 | | detaliu meci |  M15 Kuching | Hard |
| 02.08.22 | 1-a rundă | Keisuke Saitoh | Vishnu Vardhan | 6-1, 7-5 | | detaliu meci | ||
| 30.07.22 | Semifinală | Nam Hoang Ly | Keisuke Saitoh | 6-2, 6-3 | | detaliu meci | M15 Kuala | Hard |
| 29.07.22 | Sfert de finală | Keisuke Saitoh | Uisung Park | 6-3, 6-3 | | detaliu meci | ||
| 28.07.22 | a 2-a rundă | Keisuke Saitoh | Ching-Mou Yu | Ching-Mou Yu - nu s-a prezentat | | detaliu meci | ||
| 26.07.22 | 1-a rundă | Keisuke Saitoh | Hao Sheng Koay | 6-3, 6-1 | | detaliu meci | ||
| 07.07.22 | a 2-a rundă | Guy Orly Iradukunda | Keisuke Saitoh | 6-1, 6-0 | | detaliu meci | M15 Monastir | Hard |
| 06.07.22 | 1-a rundă | Keisuke Saitoh | Egor Tsarapkin | 6-2, 6-2 | | detaliu meci | ||
| 30.06.22 | a 2-a rundă | Terence Atmane | Keisuke Saitoh | 6-3, 6-4 | | detaliu meci | M15 Monastir | Hard |
| 29.06.22 | 1-a rundă | Keisuke Saitoh | Chukang Wang | 6-1, 6-3 | | detaliu meci | ||
| 23.06.22 | a 2-a rundă | Xiaofei Wang | Keisuke Saitoh | 2-6, 6-1, 6-4 | | detaliu meci | M15 Monastir | Hard |
| 21.06.22 | 1-a rundă | Keisuke Saitoh | Gabriele Bosio | 6-4, 7-5 | | detaliu meci | ||
| 17.06.22 | Sfert de finală | Skander Mansouri | Keisuke Saitoh | 6-3, 6-1 | | detaliu meci | M15 Monastir | Hard |
| 16.06.22 | a 2-a rundă | Keisuke Saitoh | Joshua Charlton | 4-6, 6-4, 6-3 | | detaliu meci | ||
| 14.06.22 | 1-a rundă | Keisuke Saitoh | Ray Ho | 6-3, 6-4 | | detaliu meci | ||
| 06.03.22 | 1-a rundă de calif. | Mitchell Harper | Keisuke Saitoh | 6-0, 4-6, 10-6 | | detaliu meci | M25 Bendigo | Hard |
| 03.03.22 | a 2-a rundă | Yusuke Takahashi | Keisuke Saitoh | 6-2, 6-2 | | detaliu meci | M25 Bendigo | Hard |
| 02.03.22 | 1-a rundă | Keisuke Saitoh | Matthew Christopher Romios | 4-6, 6-3, 3-0, Matthew Christopher Romios - retragere | | detaliu meci | ||
| 17.02.22 | a 2-a rundă | Dane Sweeny | Keisuke Saitoh | 6-3, 6-4 | | detaliu meci | M25 Canberra | Hard |
| 15.02.22 | 1-a rundă | Keisuke Saitoh | Jordan Smith | 6-2, 3-6, 7-5 | | detaliu meci | ||
| 31.01.22 | 2-a rundă de calif. | Shinji Hazawa | Keisuke Saitoh | 6-1, 6-3 | | detaliu meci | M15 Monastir | Hard |
| 30.01.22 | 1-a rundă de calif. | Keisuke Saitoh | Charlelie Cosnet | 1-6, 6-1, 10-6 | | detaliu meci | ||
| 28.01.22 | Sfert de finală | Filip Misolic | Keisuke Saitoh | 6-1, 6-4 | | detaliu meci | M25 Monastir | Hard |
| 27.01.22 | a 2-a rundă | Keisuke Saitoh | Harold Mayot | 6-4, 6-4 | | detaliu meci | ||
| 26.01.22 | 1-a rundă | Keisuke Saitoh | Aziz Ouakaa | 4-6, 7-5, 7-5 | | detaliu meci | ||
| 24.01.22 | Calificare | Keisuke Saitoh | Florent Bax | 6-2, 6-3 | | detaliu meci | ||
| 23.01.22 | 2-a rundă de calif. | Keisuke Saitoh | Linghao Zhang | 6-3, 6-3 | | detaliu meci | ||
| 20.01.22 | a 2-a rundă | Titouan Droguet | Keisuke Saitoh | 6-3, 6-0 | | detaliu meci | M25 Monastir | Hard |
| 19.01.22 | 1-a rundă | Keisuke Saitoh | Aziz Dougaz | Aziz Dougaz - nu s-a prezentat | | detaliu meci | ||
| 17.01.22 | Calificare | Keisuke Saitoh | Alexandre Ruscica | 6-3, 7-5 | | detaliu meci | ||
| 16.01.22 | 2-a rundă de calif. | Keisuke Saitoh | Preston Connor | 6-0, 6-1 | | detaliu meci | ||
| 01.09.21 | 1-a rundă | Omni Kumar | Keisuke Saitoh | 6-4, 6-2 | | detaliu meci | M15 Monastir | Hard |
| 31.08.21 | Calificare | Keisuke Saitoh | Luis Diego Chavez Villalpando | 6-1, Luis Diego Chavez Villalpando - retragere | | detaliu meci | ||
| 30.08.21 | 2-a rundă de calif. | Keisuke Saitoh | Stanko Lazic | 6-0, 6-0 | | detaliu meci | ||
| 29.08.21 | 1-a rundă de calif. | Keisuke Saitoh | Michel-Alexandre Fortin | 6-3, 6-1 | | detaliu meci | ||
| 25.08.21 | 1-a rundă | Jumpei Yamasaki | Keisuke Saitoh | 6-1, 6-1 | | detaliu meci | M15 Monastir | Hard |
| 24.08.21 | Calificare | Keisuke Saitoh | Rishi Reddy | 6-4, 6-3 | | detaliu meci | ||
| 23.08.21 | 2-a rundă de calif. | Keisuke Saitoh | Bastian Alonso Utreras Santander | 6-2, 6-0 | | detaliu meci | ||
| 22.08.21 | 1-a rundă de calif. | Keisuke Saitoh | Bryan Aguiar Kuntz | 6-4, 6-4 | | detaliu meci | ||
| 16.08.21 | 2-a rundă de calif. | Shohei Chikami | Keisuke Saitoh | 6-4, 6-1 | | detaliu meci | M15 Monastir | Hard |
| 15.08.21 | 1-a rundă de calif. | Keisuke Saitoh | Alec Beckley | 6-3, 4-6, 10-4 | | detaliu meci | ||
| 11.08.21 | 1-a rundă | Dane Sweeny | Keisuke Saitoh | 6-1, 6-4 | | detaliu meci | M15 Monastir | Hard |
| 10.08.21 | Calificare | Keisuke Saitoh | Masamichi Imamura | 7-61, 6-2 | | detaliu meci | ||
| 09.08.21 | 2-a rundă de calif. | Keisuke Saitoh | Babji Siva Atturu | 6-1, 6-0 | | detaliu meci | ||
| 08.08.21 | 1-a rundă de calif. | Keisuke Saitoh | Manuel Mouilleron Salvo | 6-3, 6-3 | | detaliu meci | ||
| 01.03.21 | 1-a rundă de calif. | Alessandro Pecci | Keisuke Saitoh | 6-4, 7-67 | | detaliu meci |  M15 Sharm | Hard |
| 21.02.21 | 1-a rundă de calif. | Samuel Vincent Ruggeri | Keisuke Saitoh | 6-0, 6-1 | | detaliu meci | M15 Sharm | Hard |
| 18.02.21 | a 2-a rundă | Yu Hsiou Hsu | Keisuke Saitoh | 6-1, 6-1 | | detaliu meci | M15 Sharm | Hard |
| 17.02.21 | 1-a rundă | Keisuke Saitoh | Sidharth Rawat | 7-62, 6-3 | | detaliu meci | ||
| 16.02.21 | Calificare | Keisuke Saitoh | Daisuke Sumizawa | 6-2, 6-4 | | detaliu meci | ||
| 15.02.21 | 1-a rundă de calif. | Keisuke Saitoh | Elgin Khoeblal | 6-0, 6-2 | | detaliu meci | ||
| 15.02.21 | 2-a rundă de calif. | Keisuke Saitoh | Chien-Hsun Lo | 6-4, 6-4 | | detaliu meci | ||
| 11.02.21 | a 2-a rundă | Nicolas Moreno De Alboran | Keisuke Saitoh | 6-4, 6-4 | | detaliu meci | M15 Sharm | Hard |
| 10.02.21 | 1-a rundă | Keisuke Saitoh | Fares Zakaria | 6-2, 6-2 | | detaliu meci | ||
| 09.02.21 | Calificare | Keisuke Saitoh | Aidan Mchugh | 6-1, 6-4 | | detaliu meci | ||
| 08.02.21 | 2-a rundă de calif. | Keisuke Saitoh | Francesco Passaro | 6-3, 7-62 | | detaliu meci | ||
| 08.02.21 | 1-a rundă de calif. | Keisuke Saitoh | Erbol Eldiyar Uulu | 6-3, 6-3 | | detaliu meci | ||
| 02.02.21 | Calificare | Roman Andres Burruchaga | Keisuke Saitoh | 6-2, 6-3 | | detaliu meci | M15 Sharm | Hard |
| 01.02.21 | 1-a rundă de calif. | Keisuke Saitoh | Vladimir Uzhylovsky | 6-4, 6-3 | | detaliu meci | ||
| 01.02.21 | 2-a rundă de calif. | Keisuke Saitoh | Mate Valkusz | 6-2, 6-2 | | detaliu meci | ||
| 09.11.20 | 2-a rundă de calif. | Arjun Kadhe | Keisuke Saitoh | 7-65, 6-1 | | detaliu meci | M15 Sharm | Hard |
| 08.11.20 | 1-a rundă de calif. | Keisuke Saitoh | Bekkhan Atlangeriev | 6-0, 6-3 | | detaliu meci | ||
| 05.11.20 | a 2-a rundă | David Poljak | Keisuke Saitoh | 6-3, 6-4 | | detaliu meci | M15 Sharm | Hard |
| 04.11.20 | 1-a rundă | Keisuke Saitoh | Raphael Collignon | 6-3, 6-3 | | detaliu meci | ||
| 03.11.20 | Calificare | Keisuke Saitoh | Petr Michnev | 7-5, 2-6, 10-8 | | detaliu meci | ||
| 02.11.20 | 2-a rundă de calif. | Keisuke Saitoh | Erik Crepaldi | 7-62, 6-0 | | detaliu meci | ||
| 02.11.20 | 1-a rundă de calif. | Keisuke Saitoh | Denis Parshutin | 6-2, 6-0 | | detaliu meci | ||
| 02.02.20 | 1-a rundă de calif. | Yuki Mochizuki | Keisuke Saitoh | 6-3, 6-0 | | detaliu meci | M25 Nonthaburi | Hard |
| 27.01.20 | 2-a rundă de calif. | Ben Patael | Keisuke Saitoh | 6-3, 6-2 | | detaliu meci | M25 Nonthaburi | Hard |
| 26.01.20 | 1-a rundă de calif. | Keisuke Saitoh | Thanapet Chanta | 6-4, 2-6, 10-8 | | detaliu meci | ||
| 03.12.19 | 1-a rundă | Makoto Ochi | Keisuke Saitoh | 6-2, 6-2 | | detaliu meci | M15 Nonthaburi | Hard |
| 29.11.19 | Sfert de finală | Duckhee Lee | Keisuke Saitoh | 6-2, 6-1 | | detaliu meci | M15 Nonthaburi | Hard |
| 28.11.19 | a 2-a rundă | Keisuke Saitoh | Rio Noguchi | 7-5, 7-66 | | detaliu meci | ||
| 27.11.19 | 1-a rundă | Keisuke Saitoh | Ryota Tanuma | 6-2, 7-62 | | detaliu meci | ||
| 02.09.19 | 1-a rundă | Dalibor Svrcina | Keisuke Saitoh | 6-1, 6-1 | | detaliu meci | U.S. Open | Hard |
| 04.04.19 | a 2-a rundă | Yusuke Takahashi | Keisuke Saitoh | 6-2, 6-1 | | detaliu meci | M15 Kashiwa | Hard |
| 03.04.19 | 1-a rundă | Keisuke Saitoh | Takashi Saito | 6-1, 2-0, Takashi Saito - retragere | | detaliu meci | ||
| 19.03.19 | 1-a rundă | Jumpei Yamasaki | Keisuke Saitoh | 6-2, 6-3 | | detaliu meci | M15 Kofu | Hard |
| 13.03.19 | 1-a rundă | Shuichi Sekiguchi | Keisuke Saitoh | 6-3, 6-2 | | detaliu meci | M15 Nishi | Hard |
| 08.03.19 | a 2-a rundă | Seongchan Hong | Keisuke Saitoh | 6-3, 6-0 | | detaliu meci | M15 Nishi | Hard |
| 06.03.19 | 1-a rundă | Keisuke Saitoh | Soichiro Moritani | 6-2, 6-0 | | detaliu meci | ||
| 20.01.19 | 1-a rundă | Emilio Nava | Keisuke Saitoh | 6-4, 6-2 | | detaliu meci | Australian Open | Hard |
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