Kei Nishikori defeated Philipp Kohlschreiber 6-4 6-3 6-3 in the Australian Open round of 128 on hard. The result followed the form book — Kei Nishikori came in leading the head-to-head 2–0, defending last year's quarter-final. Kei Nishikori extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-08-27 | US Open | R16 | hard | Kei Nishikori | 6-3 6-2 7-5 |
| 2018-05-14 | Rome Masters | R16 | clay | Kei Nishikori | 6-1 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