Head to head
3
Hard
0
2
Clay
0
0
Grass
1
Juan Martin del Potro's wins on the left · Ivo Karlovic's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (6)
| 2016 | Davis Cup WG F: ARG vs CRO | Hard | RR | Juan Martin del Potro | 6-4 6-7(6) 6-3 7-5 |
| 2016 | Stockholm | Hard | QF | Juan Martin del Potro | 6-3 6-4 |
| 2012 | Davis Cup WG QF: ARG vs CRO | Clay | RR | Juan Martin del Potro | 6-2 7-6(7) 6-1 |
| 2012 | Miami Masters | Hard | R64 | Juan Martin del Potro | 7-5 6-4 |
| 2011 | Roland Garros | Clay | R128 | Juan Martin del Potro | 6-7(7) 6-3 7-5 6-4 |
| 2007 | Nottingham | Grass | QF | Ivo Karlovic | 7-6(10) 7-5 |
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.