Yusuke Watanuki defeated Gengo Kikuchi 6-3 6-7 6-1 in the Japan F4 round of 32 on clay. The upset overturned the form book — Gengo Kikuchi came in leading the head-to-head 3–0. Yusuke Watanuki claimed a first win over Gengo Kikuchi in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2016-06-13 | Japan F8 | F | carpet | Gengo Kikuchi | 4-6 7-6(8) 6-0 |
| 2016-03-07 | Japan F1 | R16 | hard | Gengo Kikuchi | 2-6 6-4 1-0 |
| 2014-06-02 | Japan F5 | R16 | clay | Gengo Kikuchi | 2-6 6-4 6-4 |
Averages over each player's completed matches in the selected window (52 vs 57). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About