Oh Hee Kwon defeated Takahiro Ittogi 6-0 6-7 6-2 in the Japan F7 round of 16 on carpet. The upset overturned the form book — Takahiro Ittogi came in leading the head-to-head 1–0. Oh Hee Kwon claimed a first win over Takahiro Ittogi in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-06-13 | Japan F6 | R32 | carpet | Takahiro Ittogi | 2-6 6-1 7-6(7) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.