Head to head
1
Hard
0
0
Clay
1
0
Carpet
1
Russell Simpson's wins on the left · Mike Cahill's on the right · bar lengths share one scale
All meetings (3)
| 1979 | Atlanta | Hard | R16 | Russell Simpson | 6-3 6-1 |
| 1976 | Cincinnati | Clay | R64 | Mike Cahill | 6-2 6-3 |
| 1975 | Calcutta | Carpet | R32 | Mike Cahill | 6-2 6-2 |
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.