Head to head
0
Hard
2
0
Clay
1
1
Grass
0
Karol Kucera's wins on the left · Marcos Ondruska's on the right · bar lengths share one scale
All meetings (4)
| 1997 | Auckland | Hard | R16 | Marcos Ondruska | 2-6 6-2 6-3 |
| 1996 | Australian Open | Hard | R32 | Marcos Ondruska | 6-2 4-6 6-3 6-0 |
| 1995 | Wimbledon | Grass | R128 | Karol Kucera | 6-1 6-4 7-5 |
| 1994 | Athens | Clay | R16 | Marcos Ondruska | 2-6 6-3 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.