Kei Nishikori defeated Steve Johnson 6-1 7-6 in the Halle quarter-final on grass. The result followed the form book — Kei Nishikori came in leading the head-to-head 4–0, defending last year's round of 16. Kei Nishikori extended the head-to-head to 5–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-07-01 | Wimbledon | R32 | grass | Kei Nishikori | 6-4 6-3 6-2 |
| 2016-03-07 | Indian Wells Masters | R32 | hard | Kei Nishikori | 7-6(6) 7-6(5) |
| 2015-01-19 | Australian Open | R32 | hard | Kei Nishikori | 6-7(7) 6-1 6-2 6-3 |
| 2015-01-04 | Brisbane | R16 | hard | Kei Nishikori | 6-4 7-5 |
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