Head to head
2
Hard
2
Alex Calatrava's wins on the left · Stefan Koubek's on the right · bar lengths share one scale
All meetings (4)
| 2001 | Auckland | Hard | R16 | Stefan Koubek | 6-3 7-6(5) |
| 2001 | Doha | Hard | R32 | Alex Calatrava | 7-5 4-6 6-4 |
| 2000 | St. Petersburg | Hard | R32 | Alex Calatrava | 6-2 6-2 |
| 2000 | Delray Beach | Hard | F | Stefan Koubek | 6-1 4-6 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.