Head to head
5
Hard
4
2
Clay
0
Stan Wawrinka's wins on the left · Kei Nishikori's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (11)
| 2019 | Madrid Masters | Clay | R16 | Stan Wawrinka | 6-3 7-6(3) |
| 2019 | Rotterdam | Hard | SF | Stan Wawrinka | 6-2 4-6 6-4 |
| 2018 | Cincinnati Masters | Hard | R32 | Stan Wawrinka | 6-4 6-4 |
| 2017 | Brisbane | Hard | SF | Kei Nishikori | 7-6(3) 6-3 |
| 2016 | Tour Finals | Hard | RR | Kei Nishikori | 6-2 6-3 |
| 2016 | US Open | Hard | SF | Stan Wawrinka | 4-6 7-5 6-4 6-2 |
| 2016 | Canada Masters | Hard | SF | Kei Nishikori | 7-6(6) 6-1 |
| 2015 | Australian Open | Hard | QF | Stan Wawrinka | 6-3 6-4 7-6(6) |
| 2014 | US Open | Hard | QF | Kei Nishikori | 3-6 7-5 7-6(7) 6-7(5) 6-4 |
| 2012 | Cincinnati Masters | Hard | R16 | Stan Wawrinka | 6-3 6-3 |
| 2012 | Buenos Aires | Clay | QF | Stan Wawrinka | 6-4 6-2 |
Methodology
Head-to-head totals and surface splits exclude walkovers (no match was played), which follows ATP convention — walkover meetings still appear in the match list. The momentum chart plots the running lead across all counted meetings, oldest to newest.