
Kei Nishikori defeated Stefanos Tsitsipas 6-3 6-3 in the Tokyo quarter-final on hard. The upset overturned the form book — Stefanos Tsitsipas came in ranked #79, leading the head-to-head 2–1, defending last year's round of 32. Kei Nishikori narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2024-10-02 | Shanghai Masters | R64 | hard | Stefanos Tsitsipas | 7-6(6) 6-4 |
| 2024-08-05 | Canada Masters | R32 | hard | Kei Nishikori | 6-4 6-4 |
| 2021-03-22 | Miami Masters | R32 | hard | Stefanos Tsitsipas | 6-3 3-6 6-1 |
Averages from each player's recent completed matches (20 vs 20). ATP, WTA & Challenger.