Head to head
5
Hard
0
2
Clay
0
2
Grass
0
Kei Nishikori's wins on the left · Mikhail Kukushkin's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (9)
| 2019 | Wimbledon | Grass | R16 | Kei Nishikori | 6-3 3-6 6-3 6-4 |
| 2018 | Vienna | Hard | SF | Kei Nishikori | 6-4 6-3 |
| 2017 | Geneva | Clay | R16 | Kei Nishikori | 6-4 6-3 |
| 2016 | Indian Wells Masters | Hard | R64 | Kei Nishikori | 6-3 6-3 |
| 2016 | Memphis | Hard | QF | Kei Nishikori | 6-2 6-4 |
| 2016 | Brisbane | Hard | R16 | Kei Nishikori | 6-3 6-4 |
| 2012 | Wimbledon | Grass | R128 | Kei Nishikori | 7-5 6-3 6-4 |
| 2012 | Barcelona | Clay | R32 | Kei Nishikori | 6-3 4-6 6-0 |
| 2011 | Basel | Hard | QF | Kei Nishikori | 6-4 5-7 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.