Head to head
2
Hard
0
1
Grass
0
1
Carpet
0
Roscoe Tanner's wins on the left · John James's on the right · bar lengths share one scale
All meetings (4)
| 1978 | San Jose | Carpet | R32 | Roscoe Tanner | 6-2 6-2 |
| 1977 | Los Angeles-2 | Hard | R64 | Roscoe Tanner | 6-3 6-1 |
| 1977 | Palm Springs | Hard | R64 | Roscoe Tanner | 6-3 6-4 |
| 1976 | Sydney-2 | Grass | R16 | Roscoe Tanner | 6-2 6-4 |
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.