Jae Sung An defeated Takahiro Terachi 4-6 6-3 7-6 in the Japan F5 semi-final on carpet. The upset overturned the form book — Takahiro Terachi came in leading the head-to-head 1–0. Jae Sung An claimed a first win over Takahiro Terachi in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-04-24 | Japan F3 | R16 | carpet | Takahiro Terachi | 7-5 7-6(8) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.