Oh Hee Kwon defeated Tetsuya Chaen 7-5 7-5 in the Japan F1 round of 16 on carpet. The result followed the form book — Oh Hee Kwon came in leading the head-to-head 8–3. Oh Hee Kwon extended the head-to-head to 9–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-04-09 | Japan F4 | R32 | hard | Tetsuya Chaen | 6-1 5-7 7-6(3) |
| 2006-06-12 | Japan F6 | QF | clay | Tetsuya Chaen | 6-4 7-6(7) |
| 2006-04-10 | Japan F1 | QF | hard | Oh Hee Kwon | 6-2 7-5 |
| 2006-03-20 | Korea Rep F2 | R32 | hard | Oh Hee Kwon | 7-5 6-3 |
| 2006-03-13 | Korea Rep F1 | R16 | hard | Oh Hee Kwon | 6-4 6-3 |
| 2005-08-15 | Indonesia F3 | F | hard | Oh Hee Kwon | 6-3 6-3 |
| 2005-06-20 | Japan F7 | R16 | clay | Oh Hee Kwon | 6-4 7-5 |
| 2005-05-30 | Japan F5 | R16 | hard | Tetsuya Chaen | 7-5 6-3 |
| 2001-03-26 | Japan F3 | R32 | clay | Oh Hee Kwon | 6-4 4-6 6-2 |
| 2000-03-18 | Japan F2 | R16 | carpet | Oh Hee Kwon | 7-5 6-2 |
| 1999-10-18 | Japan F5 | R32 | carpet | Oh Hee Kwon | 1-6 6-2 6-2 |
Averages over each player's completed matches in the selected window (17 vs 1). 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. Small sample — read as indicative. About