Arata Onozawa defeated Thomas Shubert 7-6 6-4 in the Cambodia F3 round of 32 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 |
|---|---|---|---|---|---|
| 2013-07-01 | Japan F8 | R16 | hard | Arata Onozawa | 7-5 7-6(6) |
| 2013-05-27 | Thailand F2 | R32 | hard | Arata Onozawa | – |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.