Head to head
4
Hard
0
1
Grass
0
5
Carpet
1
John McEnroe's wins on the left · Gene Mayer's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (11)
| 1984 | US Open | Hard | QF | John McEnroe | 7-5 6-3 6-4 |
| 1982 | Sydney-1 | Hard | F | John McEnroe | 6-4 6-1 6-4 |
| 1982 | US Open | Hard | QF | John McEnroe | 4-6 7-6 6-3 4-6 6-1 |
| 1982 | Memphis | Carpet | SF | John McEnroe | 7-5 6-3 |
| 1981 | Masters | Carpet | RR | Gene Mayer | 3-6 7-6 6-2 |
| 1980 | Wembley | Carpet | F | John McEnroe | 6-4 6-3 6-3 |
| 1979 | Stockholm | Hard | F | John McEnroe | 6-7 6-3 6-3 |
| 1979 | Los Angeles | Carpet | QF | John McEnroe | 6-2 6-1 |
| 1979 | Rotterdam WCT | Carpet | R16 | John McEnroe | 6-4 6-1 |
| 1978 | Hartford | Carpet | QF | John McEnroe | 6-2 6-1 |
| 1978 | Queen's Club | Grass | R16 | John McEnroe | 7-5 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.