Head to head
Rivalry summary
Stefan Koubek and Jan Siemerink met 1 times on the ATP tour between 2001 and 2001. Stefan Koubek leads the head-to-head 1–0 against Jan Siemerink.
1
Clay
0
Stefan Koubek's wins on the left · Jan Siemerink's on the right · bar lengths share one scale
All meetings (1)
| 2001 | Kitzbuhel | Clay | R64 | Stefan Koubek | 7-5 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.