Nicolas Almagro defeated Kei Nishikori 7-6 5-7 6-3 in the Tokyo quarter-final on hard. The upset overturned the form book — Kei Nishikori came in leading the head-to-head 2–0, defending the title. Nicolas Almagro claimed a first win over Kei Nishikori in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-01-19 | Australian Open | R128 | hard | Kei Nishikori | 6-4 7-6(1) 6-2 |
| 2011-09-26 | Kuala Lumpur | QF | hard | Kei Nishikori | 6-7(5) 6-4 6-4 |
Averages from each player's recent completed matches (20 vs 20). ATP, WTA & Challenger.