By surface
| Surface | John McEnroe | Alexander Mronz |
|---|---|---|
| Carpet | 2 | 1 |
All meetings (3)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1991-11-04 | ATP | Birmingham | Round of 32 | Carpet | Alexander Mronz | 3-6 | 6-4 | 3-6 | ||
| 1991-02-25 | ATP | Chicago | Quarterfinal | Carpet | John McEnroe | W/O | ||||
| 1991-02-11 | ATP | Philadelphia | Round of 32 | Carpet | John McEnroe | 6-1 | 6-2 | |||