Yasutaka Uchiyama defeated Junn Mitsuhashi 7-6 6-4 in the Guam F1 qualifying round on hard. The upset overturned the form book — Junn Mitsuhashi came in leading the head-to-head 3–0. Yasutaka Uchiyama claimed a first win over Junn Mitsuhashi in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-07-11 | Chinese Taipei F2 | R32 | hard | Junn Mitsuhashi | 6-4 6-4 |
| 2011-06-27 | Japan F8 | QF | clay | Junn Mitsuhashi | 6-1 7-6(3) |
| 2011-06-06 | Japan F5 | SF | clay | Junn Mitsuhashi | 7-5 7-6(3) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.