Keita Koyama defeated Yuki Matsuo 6-4 6-1 in the Japan F7 round of 32 on clay. The result followed the form book — Keita Koyama came in leading the head-to-head 1–0. Keita Koyama extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-06-20 | Japan F7 | R16 | grass | Keita Koyama | 6-7(4) 6-4 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.