Head to head
1
Hard
0
2
Carpet
1
Billy Martin's wins on the left · Jurgen Fassbender's on the right · bar lengths share one scale
All meetings (4)
| 1975 | Salisbury | Carpet | R16 | Billy Martin | 7-6 4-6 6-2 |
| 1975 | Birmingham | Carpet | SF | Billy Martin | 6-3 6-4 |
| 1974 | Salt Lake City | Hard | QF | Billy Martin | 5-3 RET |
| 1973 | Washington-2 | Carpet | QF | Jurgen Fassbender | 6-4 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.