Head to head
2
Hard
1
2
Clay
0
3
Grass
0
John Alexander's wins on the left · Allan Stone's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (8)
| 1978 | Sydney-2 | Grass | QF | John Alexander | 6-2 6-2 |
| 1976 | Palm Springs | Hard | R64 | John Alexander | 6-2 6-4 |
| 1975 | Sydney-1 | Hard | R16 | John Alexander | 4-6 6-1 7-6 |
| 1974 | Australian Open | Grass | R16 | John Alexander | 6-2 6-4 7-5 |
| 1972 | Boston WCT | Hard | R32 | Allan Stone | 7-6 7-6 |
| 1972 | Louisville WCT | Clay | R32 | John Alexander | 4-6 6-3 6-2 |
| 1972 | Charlotte WCT | Clay | R32 | John Alexander | 6-7 7-6 6-1 |
| 1971 | US Open | Grass | R64 | John Alexander | 6-4 4-1 RET |
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.