Arata Onozawa defeated Hiroki Kondo 0-6 6-4 6-2 in the Thailand F2 round of 32 on hard. The upset overturned the form book — Hiroki Kondo came in leading the head-to-head 3–1. Arata Onozawa narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2016-03-07 | Japan F1 | R32 | hard | Arata Onozawa | 2-6 6-3 3-0 |
| 2013-11-25 | Cambodia F1 | R16 | hard | Hiroki Kondo | 6-3 6-2 |
| 2009-06-08 | Japan F4 | QF | clay | Hiroki Kondo | 7-6(4) 6-0 |
| 2009-03-30 | Japan F3 | R16 | hard | Hiroki Kondo | 6-1 6-2 |
Averages over each player's completed matches in the selected window (46 vs 20). 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