Head to head
1
Hard
0
1
Clay
0
John McEnroe's wins on the left · Per Hjertquist's on the right · bar lengths share one scale
All meetings (2)
| 1981 | Montreal | Hard | R64 | John McEnroe | 6-3 6-2 |
| 1980 | Roland Garros | Clay | R64 | John McEnroe | 6-4 7-6 6-0 |
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.