Shuichi Sekiguchi defeated Gengo Kikuchi 0-6 7-5 7-6 in the Japan F6 round of 16 on grass. The upset overturned the form book — Gengo Kikuchi came in leading the head-to-head 3–1. Shuichi Sekiguchi narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-05-29 | Japan F6 | R16 | clay | Gengo Kikuchi | 6-4 6-2 |
| 2016-05-23 | Guam F1 | QF | hard | Shuichi Sekiguchi | 7-6(10) 7-6(5) |
| 2016-03-07 | Japan F1 | SF | hard | Gengo Kikuchi | 7-6(5) 6-1 |
| 2013-03-18 | Japan F2 | R16 | hard | Gengo Kikuchi | 7-5 7-6(5) |
Averages over each player's completed matches in the selected window (200 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