Keisuke Watanuki defeated Gengo Kikuchi 6-2 5-7 7-6 in the Japan F4 qualifying round of 16 on hard. The upset overturned the form book — Gengo Kikuchi came in leading the head-to-head 1–0. Keisuke Watanuki claimed a first win over Gengo Kikuchi in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-06-10 | Japan F5 | R32 | clay | Gengo Kikuchi | 3-6 7-5 7-6(3) |
Averages over each player's completed matches in the selected window (10 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