Head to head
0
Hard
2
1
Clay
0
0
Grass
2
0
Carpet
3
Billy Martin's wins on the left · Stan Smith's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (8)
| 1978 | Denver | Carpet | R32 | Stan Smith | 7-6 6-4 |
| 1977 | Stockholm | Hard | R32 | Stan Smith | 6-3 6-4 |
| 1977 | Maui | Hard | R16 | Stan Smith | 6-4 6-1 |
| 1977 | Los Angeles-1 | Carpet | R32 | Stan Smith | 4-6 6-1 6-1 |
| 1974 | Washington-2 | Clay | QF | Billy Martin | 6-3 1-6 7-6 |
| 1974 | Chicago | Carpet | R32 | Stan Smith | 3-6 6-1 6-2 |
| 1973 | US Open | Grass | R64 | Stan Smith | 6-3 6-2 6-1 |
| 1972 | US Open | Grass | R128 | Stan Smith | 5-7 6-1 7-5 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.