Head to head
0
Hard
3
1
Clay
0
Juan Ignacio Chela's wins on the left · Stefan Koubek's on the right · bar lengths share one scale
All meetings (4)
| 2007 | Basel | Hard | R32 | Stefan Koubek | 6-3 6-4 |
| 2000 | US Open | Hard | R128 | Stefan Koubek | 4-6 6-3 7-6(4) 7-6(5) |
| 2000 | Long Island | Hard | R64 | Stefan Koubek | 7-6(3) 6-3 |
| 2000 | Mexico City | Clay | SF | Juan Ignacio Chela | 7-6(2) 6-3 |
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.