Head to head
1
Hard
0
1
Clay
1
1
Grass
0
0
Carpet
1
John James's wins on the left · Henry Pfister's on the right · bar lengths share one scale
All meetings (5)
| 1980 | Indianapolis | Clay | R64 | Henry Pfister | 6-3 6-3 |
| 1979 | Little Rock | Hard | QF | John James | 6-3 6-4 |
| 1977 | Sydney-2 | Grass | R64 | John James | 6-1 6-2 |
| 1977 | San Francisco | Carpet | R32 | Henry Pfister | 6-1 2-6 7-5 |
| 1977 | Indianapolis | Clay | R64 | John James | 6-4 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.