01/By surface
each with its own count, at equal weight
Hard
1-0
D. leads 1-0 in 1 meeting on hard
Clay
Never on clay
no meeting on this surface
Grass
1-0
D. leads 1-0 in 1 meeting on grass
02/Every meeting
2 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, D. first |
|---|---|---|---|---|---|---|
| Mar 11, 2017 | BNP Paribas OpenMasters 1000 | hard | 1st round | Young D. | 7-5, 7-6 | 60 v 116 |
| Jul 13, 2016 | Hall of Fame ChampionshipsATP250 | grass | 2nd round | Young D. | 6-0, 6-4 | 61 v 169 |
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. Young D. and Kozlov S. each carry the table against every opponent faced.