Head to head
1
Hard
0
1
Clay
0
1
Grass
0
3
Carpet
2
John McEnroe's wins on the left · Butch Walts's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (8)
| 1980 | Wimbledon | Grass | R128 | John McEnroe | 6-3 6-3 6-0 |
| 1980 | Forest Hills WCT | Clay | R32 | John McEnroe | 6-3 6-1 |
| 1979 | Bologna | Carpet | SF | Butch Walts | 6-4 6-7 6-3 |
| 1979 | San Francisco | Carpet | QF | John McEnroe | 3-6 7-6 6-4 |
| 1979 | San Jose-2 | Carpet | SF | John McEnroe | 6-4 6-4 |
| 1978 | US Open | Hard | QF | John McEnroe | 6-1 6-2 7-6 |
| 1978 | Philadelphia WCT | Carpet | R64 | John McEnroe | 6-3 6-2 |
| 1977 | San Francisco | Carpet | QF | Butch Walts | 6-3 6-7 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.