Kei Nishikori defeated Diego Schwartzman 6-4 6-4 5-7 6-1 in the US Open round of 32 on hard. The upset overturned the form book — Diego Schwartzman came in defending last year's quarter-final. Kei Nishikori extended the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-02-02 | Atp Cup | RR | hard | Diego Schwartzman | 6-1 6-7(4) 6-0 |
| 2019-05-13 | Rome Masters | QF | clay | Diego Schwartzman | 6-4 6-2 |
| 2017-05-08 | Madrid Masters | R32 | clay | Kei Nishikori | 1-6 6-0 6-4 |
| 2017-02-13 | Buenos Aires | R16 | clay | Kei Nishikori | 5-7 6-2 6-2 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (200 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About