Ken Onishi defeated Ryota Tanuma 6-2 4-6 6-3 in the Japan F2 qualifying round of 16 on hard. Ken Onishi extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-10-23 | Malaysia F2 | R32 | hard | Ken Onishi | 6-4 3-6 6-1 |
| 2017-04-03 | Japan F5 | R32 | hard | Ryota Tanuma | 7-6(4) 6-2 |
Averages over each player's completed matches in the selected window (51 vs 200). 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