Head to head
1
Hard
2
0
Grass
2
0
Carpet
3
Allan Stone's wins on the left · Cliff Drysdale's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (8)
| 1978 | Los Angeles | Carpet | R32 | Cliff Drysdale | 6-1 3-6 6-3 |
| 1973 | St. Louis WCT | Carpet | R16 | Cliff Drysdale | 6-4 7-6(3) |
| 1973 | Carlsbad WCT | Hard | R32 | Allan Stone | 6-1 6-4 |
| 1972 | Boston WCT | Hard | R16 | Cliff Drysdale | 6-4 6-2 |
| 1971 | Stockholm WCT | Hard | R64 | Cliff Drysdale | 3-6 6-3 6-4 |
| 1971 | Philadelphia WCT | Carpet | R32 | Cliff Drysdale | 6-2 6-1 |
| 1970 | South Orange | Grass | R32 | Cliff Drysdale | 7-6 4-6 7-6 |
| 1968 | US Open | Grass | R32 | Cliff Drysdale | 6-3 6-2 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.