01/By surface
each with its own count, at equal weight
Hard
3-0
I. leads 3-0 in 3 meetings on hard
Clay
Never on clay
no meeting on this surface
Grass
0-1
Y.H. leads 1-0 in 1 meeting on grass
02/Every meeting
4 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, I. first |
|---|---|---|---|---|---|---|
| Aug 30, 2016 | US OpenGrand Slam, best of 5 | hard | 1st round | Karlovic I. | 4-6, 7-6, 6-7, 7-6, 7-5 | 23 v 73 |
| Oct 7, 2014 | Shanghai MastersMasters 1000 | hard | 2nd round | Karlovic I. | 7-6, 6-3 | 31 v 45 |
| Jun 12, 2014 | Gerry Weber OpenATP250 | grass | 2nd round | Lu Y.H. | 7-6, 7-6 | 33 v 48 |
| Feb 15, 2014 | U.S. National Indoor Tennis ChampionshipsATP250 | hard | semifinal | Karlovic I.ret. | 6-1 | 80 v 54 |
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 Lu Y.H. each carry the table against every opponent faced.