Arata Onozawa defeated Liang Chi Huang 6-2 6-3 in the Cambodia F2 round of 32 on hard. The upset overturned the form book — Liang Chi Huang came in leading the head-to-head 4–1. Arata Onozawa narrowed the head-to-head to 4–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-08-03 | China F12 | R16 | hard | Arata Onozawa | 5-5 |
| 2014-08-18 | Chinese Taipei F1 | QF | hard | Liang Chi Huang | 6-1 6-4 |
| 2013-03-11 | Japan F1 | R16 | hard | Liang Chi Huang | 6-4 7-6(3) |
| 2011-11-14 | Chinese Taipei F4 | QF | clay | Liang Chi Huang | 5-2 |
| 2011-07-04 | Chinese Taipei F1 | R32 | hard | Liang Chi Huang | 5-7 6-1 6-1 |
Averages over each player's completed matches in the selected window (46 vs 70). 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