Head to head
1
Hard
0
0
Clay
1
Colin Dowdeswell's wins on the left · Billy Martin's on the right · bar lengths share one scale
All meetings (2)
| 1979 | Little Rock | Hard | R32 | Colin Dowdeswell | 4-6 6-4 7-6 |
| 1975 | Louisville | Clay | R64 | Billy Martin | 3-6 6-1 6-1 |
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.