Head to head
Rivalry summary
Stefan Koubek and Jan-Michael Gambill met 6 times on the ATP tour between 1999 and 2004. Jan-Michael Gambill leads the head-to-head 4–2 against Stefan Koubek. By surface, Gambill leads 4–2 on hard. They contested 1 finals, with Koubek winning 1 of them.
2
Hard
4
Stefan Koubek's wins on the left · Jan-Michael Gambill's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (6)
| 2004 | Washington | Hard | R32 | Jan-Michael Gambill | 7-5 6-4 |
| 2003 | Miami Masters | Hard | R128 | Jan-Michael Gambill | 2-6 6-3 6-2 |
| 2002 | Doha | Hard | F | Stefan Koubek | 6-4 6-4 |
| 2002 | Long Island | Hard | R32 | Jan-Michael Gambill | 6-4 3-6 6-2 |
| 2000 | Delray Beach | Hard | R16 | Stefan Koubek | 6-1 7-6(7) |
| 1999 | US Open | Hard | R128 | Jan-Michael Gambill | 7-5 6-1 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.