Tomas Berdych defeated Kei Nishikori 2-6 6-2 6-4 in the Monte Carlo Masters round of 16 on clay. The upset overturned the form book — Kei Nishikori came in leading the head-to-head 5–0. Tomas Berdych claimed a first win over Kei Nishikori in six meetings, narrowing the head-to-head to 5–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-04-16 | Monte Carlo Masters | R64 | clay | Kei Nishikori | 4-6 6-2 6-1 |
| 2015-11-15 | Tour Finals | RR | hard | Kei Nishikori | 7-5 3-6 6-3 |
| 2012-10-01 | Tokyo | QF | hard | Kei Nishikori | 7-5 6-4 |
| 2011-10-31 | Basel | R32 | hard | Kei Nishikori | 3-6 6-3 6-2 |
| 2009-01-04 | Brisbane | R16 | hard | Kei Nishikori | 7-6(7) 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
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