Head to head
2
Clay
1
1
Grass
0
0
Carpet
1
Stefan Koubek's wins on the left · Adrian Voinea's on the right · bar lengths share one scale
All meetings (5)
| 2002 | Kitzbuhel | Clay | R32 | Stefan Koubek | 6-2 6-3 |
| 2002 | Davis Cup G1 QF: ROU vs AUT | Carpet | RR | Adrian Voinea | 3-6 7-5 6-3 6-1 |
| 2000 | Wimbledon | Grass | R128 | Stefan Koubek | 3-3 RET |
| 1999 | Bournemouth | Clay | F | Adrian Voinea | 1-6 7-5 7-6(2) |
| 1999 | San Marino | Clay | R16 | Stefan Koubek | 6-3 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.