Head to head
0
Hard
3
1
Grass
2
0
Carpet
1
Wally Masur's wins on the left · John McEnroe's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (7)
| 1991 | Indian Wells Masters | Hard | R64 | John McEnroe | 7-6(5) 2-6 7-5 |
| 1991 | Philadelphia | Carpet | R16 | John McEnroe | 7-6(2) 6-4 |
| 1989 | Tokyo-1 | Hard | R16 | John McEnroe | 6-2 6-0 |
| 1988 | Wimbledon | Grass | R64 | Wally Masur | 7-5 7-6 6-3 |
| 1986 | Stratton Mountain | Hard | R16 | John McEnroe | 6-2 7-6 |
| 1984 | Wimbledon | Grass | R32 | John McEnroe | 6-0 6-4 6-3 |
| 1983 | Australian Open | Grass | QF | John McEnroe | 6-2 6-1 6-2 |
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.