Weerapat Doakmaiklee defeated Kento Takeuchi 6-4 6-4 in the Japan F1 round of 32 on hard. The upset overturned the form book — Kento Takeuchi came in leading the head-to-head 4–1. Weerapat Doakmaiklee narrowed the head-to-head to 4–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-04-16 | Vietnam F3 | R16 | hard | Kento Takeuchi | 6-1 6-4 |
| 2010-03-29 | Japan F3 | R32 | hard | Weerapat Doakmaiklee | 1-6 6-3 6-4 |
| 2009-10-19 | Thailand F6 | R32 | hard | Kento Takeuchi | 4-6 7-6(7) 1-0 |
| 2009-06-15 | Japan F5 | R32 | carpet | Kento Takeuchi | 6-4 6-3 |
| 2009-05-04 | China F3 | R32 | hard | Kento Takeuchi | 5-7 6-1 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.