Head to head
1
Hard
3
1
Clay
0
0
Grass
1
1
Carpet
2
John Alexander's wins on the left · Roscoe Tanner's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (9)
| 1983 | Wimbledon | Grass | R64 | Roscoe Tanner | 6-2 7-6 4-6 6-3 |
| 1982 | Tampa | Hard | R16 | Roscoe Tanner | 6-7 6-4 6-2 |
| 1982 | La Quinta | Hard | R32 | Roscoe Tanner | 4-6 7-6 7-5 |
| 1979 | Memphis | Carpet | QF | Roscoe Tanner | 6-7 6-2 6-4 |
| 1977 | Washington-2 | Clay | R16 | John Alexander | 7-6 6-3 |
| 1975 | Chicago | Carpet | F | Roscoe Tanner | 6-1 6-7 7-6 |
| 1975 | WCT Finals | Carpet | QF | John Alexander | 6-3 6-2 6-3 |
| 1974 | Los Angeles | Hard | R16 | Roscoe Tanner | 7-5 7-6 |
| 1974 | Lakeway WCT | Hard | QF | John Alexander | 6-4 3-6 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.