Tasuku Iwami defeated Kentaro Masuda 6-7 6-4 7-6 in the Japan F6 semi-final on hard. Tasuku Iwami extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2002-09-09 | Japan F7 | R16 | hard | Tasuku Iwami | 6-7(2) 6-3 7-6(4) |
| 1998-05-04 | China F1 | R32 | hard | Kentaro Masuda | 7-5 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.