01/By surface
each with its own count, at equal weight
Hard
3-0
I. leads 3-0 in 3 meetings on hard
Clay
0-1
J. leads 1-0 in 1 meeting on clay
Grass
1-0
I. leads 1-0 in 1 meeting on grass
02/Every meeting
5 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, I. first |
|---|---|---|---|---|---|---|
| Jul 22, 2016 | Citi OpenATP500 | hard | quarterfinal | Karlovic I. | 7-6, 7-6 | 35 v 26 |
| Jul 18, 2015 | Hall of Fame ChampionshipsATP250 | grass | semifinal | Karlovic I. | 7-6, 6-4 | 24 v 39 |
| Apr 7, 2014 | U.S. Men's Clay Court ChampionshipsATP250 | clay | 1st round | Sock J. | 6-1, 6-4 | 52 v 94 |
| Feb 15, 2014 | U.S. National Indoor Tennis ChampionshipsATP250 | hard | quarterfinal | Karlovic I. | 7-6, 6-7, 6-3 | 80 v 85 |
| Mar 8, 2013 | BNP Paribas OpenMasters 1000 | hard | 1st round | Karlovic I. | 3-6, 7-6, 6-2 | 143 v 125 |
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. Karlovic I. and Sock J. each carry the table against every opponent faced.