Kento Takeuchi defeated Hyung Tae Kwon 6-2 6-3 in the Japan F1 round of 32 on hard. The upset overturned the form book — Hyung Tae Kwon came in leading the head-to-head 2–0, but Kento Takeuchi had been the form player, winning 2 of their last 5 on hard. Kento Takeuchi claimed a first win over Hyung Tae Kwon in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-06-23 | Japan F6 | R32 | carpet | Hyung Tae Kwon | 6-3 6-2 |
| 2007-06-11 | Thailand F2 | R32 | hard | Hyung Tae Kwon | 6-4 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.