Head to head
2
Hard
3
1
Clay
0
Juan Martin del Potro's wins on the left · Radek Stepanek's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (6)
| 2014 | Sydney | Hard | QF | Juan Martin del Potro | 6-4 3-6 6-3 |
| 2012 | Davis Cup WG SF: ARG vs CZE | Clay | RR | Juan Martin del Potro | 6-4 6-4 6-2 |
| 2012 | Canada Masters | Hard | R32 | Radek Stepanek | 6-4 7-6(5) |
| 2011 | Indian Wells Masters | Hard | R128 | Juan Martin del Potro | 6-4 6-0 |
| 2009 | Paris Masters | Hard | QF | Radek Stepanek | 4-0 RET |
| 2009 | Memphis | Hard | QF | Radek Stepanek | 7-6(7) 6-4 |
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.