Head to head
1
Hard
0
1
Clay
0
Mike Cahill's wins on the left · Syd Ball's on the right · bar lengths share one scale
All meetings (2)
| 1975 | Sydney-1 | Hard | R64 | Mike Cahill | 6-4 6-4 |
| 1974 | Indianapolis | Clay | R64 | Mike Cahill | 1-6 6-3 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.