Head to head
1
Clay
1
1
Carpet
0
Hans Kary's wins on the left · Billy Martin's on the right · bar lengths share one scale
All meetings (3)
| 1979 | Bastad | Clay | R16 | Billy Martin | 6-4 6-3 |
| 1975 | Indianapolis | Clay | R64 | Hans Kary | 6-4 6-1 |
| 1973 | Salisbury | Carpet | R64 | Hans Kary | 5-7 6-2 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.