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Keisuke Saitoh
- Country
- Japan
- Date of birth
- 2001-04-29
- Plays
- left-handed
- Ranking ATP
- 548 · 77 points
- Live ranking
- 551 · 78 points
- Ranking ATP (doubles)
- 640 · 80 points
- Season 2026
- 1–1
Recent matches
| Date | Tournament | Round | Opponent | Score | Result |
|---|
| 2026-09-29 | Jingshan Open | Q2 | Mattia Bellucci | 2-6 2-6 | lost |
| 2026-09-29 | Jingshan Open | Q1 | Koki Matsuda | 6-3 6-2 | won |
| 2025-11-03 | Matsuyama | Q1 | Koki Matsuda | 5-7 7-5 4-6 | lost |
| 2025-07-14 | Granby | Q1 | Andres Martin | 1-6 5-7 | lost |
| 2025-07-07 | Newport | Q2 | Quinn Vandecasteele | 4-6 6-7 | lost |
| 2025-07-07 | Newport | Q1 | Hans Hach Verdugo | 6-2 7-6 | won |
| 2025-06-02 | Tyler | Q1 | Yibing Wu | 1-6 3-6 | lost |
| 2025-05-26 | Little Rock | Q1 | Hyeon Chung | 0-6 2-6 | lost |
| 2025-05-05 | Wuxi | Q1 | Andre Ilagan | 2-6 2-6 | lost |
| 2025-02-03 | Brisbane 2 | R32 | Andre Ilagan | 5-7 2-6 | lost |
| 2025-02-03 | Brisbane 2 | Q2 | Thomas Braithwaite | 6-4 6-4 | won |
| 2025-02-03 | Brisbane 2 | Q1 | Ty Host | 6-2 6-4 | won |
| 2025-01-27 | Brisbane 1 | Q1 | Sam Ryan Ziegann | 2-6 4-6 | lost |