Head to head
0
Hard
6
1
Grass
0
Ivo Karlovic's wins on the left · Sam Querrey's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (7)
| 2018 | New York | Hard | QF | Sam Querrey | 7-6(5) 7-6(4) |
| 2013 | Metz | Hard | R32 | Sam Querrey | 4-6 7-6(4) 6-4 |
| 2013 | Indian Wells Masters | Hard | R64 | Sam Querrey | 6-3 6-4 |
| 2008 | US Open | Hard | R32 | Sam Querrey | 7-6(5) 7-6(5) 6-2 |
| 2008 | Nottingham | Grass | R16 | Ivo Karlovic | 7-6(3) 7-6(14) |
| 2007 | Indianapolis | Hard | R16 | Sam Querrey | 5-7 7-5 7-6(6) |
| 2007 | Memphis | Hard | R32 | Sam Querrey | 6-3 6-2 |
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.