Head to head
1
Clay
0
1
Grass
1
1
Carpet
0
Geoff Masters's wins on the left · Allan Stone's on the right · bar lengths share one scale
All meetings (4)
| 1975 | Dayton | Carpet | QF | Geoff Masters | 6-2 6-4 |
| 1974 | Melbourne | Clay | QF | Geoff Masters | 6-4 4-6 6-4 |
| 1971 | Eastbourne | Grass | QF | Geoff Masters | 6-3 3-6 6-4 |
| 1968 | Adelaide | Grass | R16 | Allan Stone | 7-5 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.