Head to head
3
Hard
0
2
Grass
0
Kei Nishikori's wins on the left · Steve Johnson's on the right · bar lengths share one scale
All meetings (5)
| 2019 | Wimbledon | Grass | R32 | Kei Nishikori | 6-4 6-3 6-2 |
| 2016 | Indian Wells Masters | Hard | R32 | Kei Nishikori | 7-6(6) 7-6(5) |
| 2015 | Australian Open | Hard | R32 | Kei Nishikori | 6-7(7) 6-1 6-2 6-3 |
| 2015 | Brisbane | Hard | R16 | Kei Nishikori | 6-4 7-5 |
| 2014 | Halle | Grass | QF | Kei Nishikori | 6-1 7-6(4) |
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.