Head to head
4
Hard
0
Nicolas Kiefer's wins on the left · Sjeng Schalken's on the right · bar lengths share one scale
All meetings (4)
| 2005 | Adelaide | Hard | R32 | Nicolas Kiefer | 6-2 4-6 6-3 |
| 2003 | Los Angeles | Hard | R16 | Nicolas Kiefer | 6-4 6-4 |
| 2000 | US Open | Hard | R32 | Nicolas Kiefer | 7-5 6-3 6-4 |
| 2000 | Doha | Hard | QF | Nicolas Kiefer | 6-1 6-0 |
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.