Head to head
2
Hard
4
1
Clay
2
James Blake'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 (9)
| 2013 | US Open | Hard | R128 | Ivo Karlovic | 6-7(2) 3-6 6-4 7-6(2) 7-6(2) |
| 2010 | Delray Beach | Hard | QF | Ivo Karlovic | 6-3 6-7(5) 6-1 |
| 2009 | Shanghai Masters | Hard | R64 | James Blake | 3-6 7-6(4) 6-3 |
| 2009 | Davis Cup WG QF: CRO vs USA | Clay | RR | Ivo Karlovic | 6-7(5) 4-6 6-3 7-6(3) 7-5 |
| 2009 | Madrid Masters | Clay | R32 | James Blake | 6-7(4) 6-4 7-6(4) |
| 2007 | Basel | Hard | R16 | Ivo Karlovic | 4-6 7-6(4) 6-4 |
| 2007 | Roland Garros | Clay | R128 | Ivo Karlovic | 4-6 6-4 7-5 7-5 |
| 2007 | San Jose | Hard | R16 | Ivo Karlovic | 6-7(4) 7-6(11) 6-4 |
| 2006 | Las Vegas | Hard | SF | James Blake | 7-6(2) 6-1 |
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.