Head to head
1
Hard
1
1
Carpet
0
John James's wins on the left · Byron Bertram's on the right · bar lengths share one scale
All meetings (3)
| 1980 | Tampa | Hard | R16 | Byron Bertram | 6-2 5-7 7-6 |
| 1978 | Tulsa | Hard | R32 | John James | 6-1 6-1 |
| 1975 | Chicago | Carpet | R32 | 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.