Hiromasa Oku defeated Tadayuki Longhi 6-3 6-0 in the Japan F5 round of 16 on clay. The result followed the form book — Hiromasa Oku came in leading the head-to-head 1–0. Hiromasa Oku extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-06-24 | Japan F7 | R32 | clay | Hiromasa Oku | 6-2 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.