Oh Hee Kwon defeated Toshiharu Kato 6-3 6-2 in the Japan F5 round of 32 on hard. The result followed the form book — Oh Hee Kwon came in leading the head-to-head 2–0. Oh Hee Kwon extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-09-17 | Japan F9 | R16 | carpet | Oh Hee Kwon | 1-6 6-2 6-3 |
| 1999-10-18 | Japan F5 | R16 | carpet | Oh Hee Kwon | 6-3 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.