Arata Onozawa defeated Thomas Shubert 7-5 7-6 in the Japan F8 round of 16 on hard. The result followed the form book — Arata Onozawa came in leading the head-to-head 2–0. Arata Onozawa extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-12-09 | Cambodia F3 | R32 | hard | Arata Onozawa | 7-6(3) 6-4 |
| 2013-05-27 | Thailand F2 | R32 | hard | Arata Onozawa | – |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.