Hyung Tae Kwon defeated Daniel Yoo 6-3 6-2 in the Japan F5 round of 16 on carpet. The upset overturned the form book — Daniel Yoo came in leading the head-to-head 1–0. Hyung Tae Kwon claimed a first win over Daniel Yoo in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-04-23 | Korea Rep F1 | R32 | hard | Daniel Yoo | 6-0 4-6 7-6(5) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.