Issei Okamura defeated Koichi Sano 6-2 6-4 in the Japan F6 round of 32 on hard. Issei Okamura extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2016-07-18 | China F13 | R16 | clay | Issei Okamura | 6-0 6-2 |
| 2014-03-10 | Japan F1 | Q32 | hard | Koichi Sano | 4-6 7-5 6-3 |
Averages over each player's completed matches in the selected window (200 vs 8). ATP, WTA & Challenger.
wins 54% of points on serve vs Okamura I.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About