Wei Ju Chen defeated Takahiro Terachi 6-4 6-1 in the Japan 2 Masters 4 qualifying round on hard. The upset overturned the form book — Takahiro Terachi came in leading the head-to-head 3–0, but Wei Ju Chen had been the form player, winning 3 of their last 7 on hard. Wei Ju Chen claimed a first win over Takahiro Terachi in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-10-18 | Japan F5 | R16 | carpet | Takahiro Terachi | 6-4 6-4 |
| 1999-06-07 | Japan 1 Masters 4 | R16 | hard | Takahiro Terachi | 6-3 6-3 |
| 1997-11-17 | Japan 2 Masters 1 | R32 | hard | Takahiro Terachi | 6-1 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.