
Kei Nishikori advanced when Gael Monfils retired 6-2 5-4 in the US Open round of 64. Kei Nishikori extended the head-to-head to 4–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-08-07 | Canada Masters | R32 | hard | Gael Monfils | 6-7(4) 7-5 7-6(6) |
| 2016-08-08 | Rio Olympics | QF | hard | Kei Nishikori | 7-6(4) 4-6 7-6(6) |
| 2016-03-21 | Miami Masters | QF | hard | Kei Nishikori | 4-6 6-3 7-6(3) |
| 2014-06-09 | Halle | R16 | grass | Kei Nishikori | 6-1 3-6 6-3 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Per-surface Serve / Return Rating (0–100, percentile within the hard field, opponent-adjusted over 52 weeks). About
Averages over each player's completed matches in the selected window (200 vs 199). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About