01/By surface
each with its own count, at equal weight
Hard
2-1
K. leads 2-1 in 3 meetings on hard
Clay
0-1
Potro J.M. leads 1-0 in 1 meeting on clay
Grass
Never on grass
no meeting on this surface
02/Every meeting
4 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, K. first |
|---|---|---|---|---|---|---|
| Mar 25, 2018 | Sony Ericsson OpenMasters 1000 | hard | 3rd round | Del Potro J.M. | 6-2, 6-2 | 33 v 6 |
| Aug 4, 2017 | Citi OpenATP500 | hard | 3rd round | Nishikori K. | 6-4, 7-5 | 9 v 32 |
| May 18, 2017 | Internazionali BNL d'ItaliaMasters 1000 | clay | 3rd round | Del Potro J.M. | 7-6, 6-3 | 9 v 34 |
| Oct 28, 2016 | Swiss IndoorsATP500 | hard | quarterfinal | Nishikori K. | 7-5, 6-4 | 5 v 42 |
A record, never a share of meetings. Main-draw singles since 2013; a meeting ended by retirement is counted with the sets that were played and marked; a walkover is listed and counted in neither column. Nishikori K. and Del Potro J.M. each carry the table against every opponent faced.