Yuki Matsuo defeated Arata Onozawa 7-5 1-6 6-4 in the Australia F3 round of 32 on clay. The upset overturned the form book — Arata Onozawa came in leading the head-to-head 1–0. Yuki Matsuo claimed a first win over Arata Onozawa in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-08-08 | Kazakhstan F5 | R32 | hard | Arata Onozawa | 6-4 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.