Head to head
1
Hard
1
0
Clay
3
Jaime Yzaga's wins on the left · Karel Novacek's on the right · bar lengths share one scale
All meetings (5)
| 1994 | US Open | Hard | QF | Karel Novacek | 6-2 6-7(7) 6-1 5-7 6-3 |
| 1993 | Rome Masters | Clay | R64 | Karel Novacek | 7-6(5) 6-2 |
| 1990 | US Open | Hard | R128 | Jaime Yzaga | 7-5 7-6 6-3 |
| 1990 | Estoril | Clay | R32 | Karel Novacek | 6-3 3-6 6-2 |
| 1986 | Washington | Clay | R64 | Karel Novacek | 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.