Keisuke Saitoh advanced when Ryota Tanuma retired 4-1 in the Yokkaichi CH qualifying round 1. Keisuke Saitoh extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2022-09-09 | M25 Sapporo 2 | QF | hard | Keisuke Saitoh | 0-6 6-4 6-3 |
| 2019-11-27 | M15 Nonthaburi 1 | R32 | hard | Keisuke Saitoh | 6-2 7-6(2) |
Averages over each player's completed matches in the selected window (165 vs 98). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About