Head to head
0
Hard
2
0
Grass
1
1
Carpet
0
Jan Siemerink's wins on the left · Patrick McEnroe's on the right · bar lengths share one scale
All meetings (4)
| 1993 | Hong Kong | Hard | R16 | Patrick McEnroe | 6-4 6-4 |
| 1991 | Long Island | Hard | R32 | Patrick McEnroe | 4-6 6-4 6-3 |
| 1990 | Vienna | Carpet | R32 | Jan Siemerink | 4-6 7-5 6-3 |
| 1990 | Rosmalen | Grass | R16 | Patrick McEnroe | 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.