Oh Hee Kwon defeated Guilherme Ochiai 6-3 6-2 in the Tokyo q32 on hard. The result followed the form book — Oh Hee Kwon came in leading the head-to-head 3–0. Oh Hee Kwon extended the head-to-head to 4–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-07-18 | China F4 | QF | hard | Oh Hee Kwon | 6-3 6-2 |
| 2005-04-11 | Japan F1 | R32 | carpet | Oh Hee Kwon | 6-3 3-6 6-2 |
| 2004-05-31 | Japan F5 | R32 | hard | Oh Hee Kwon | 4-6 6-2 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.