Head to head
1
Hard
0
1
Clay
1
1
Grass
0
Nicolas Kiefer's wins on the left · Alex Calatrava's on the right · bar lengths share one scale
All meetings (4)
| 2002 | Roland Garros | Clay | R128 | Alex Calatrava | 6-3 6-0 6-4 |
| 2001 | Wimbledon | Grass | R128 | Nicolas Kiefer | 2-6 6-3 6-1 6-4 |
| 2001 | Doha | Hard | R16 | Nicolas Kiefer | 6-0 7-6(2) |
| 2000 | Gstaad | Clay | R32 | Nicolas Kiefer | 6-3 7-6(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.