Head to head
Rivalry summary
Terry Ryan and Allan Stone met 4 times on the ATP tour between 1969 and 1973. Allan Stone leads the head-to-head 3–1 against Terry Ryan. By surface, Stone leads 2–0 on clay; they are level 1–1 on grass.
0
Clay
2
1
Grass
1
Terry Ryan's wins on the left · Allan Stone's on the right · bar lengths share one scale
All meetings (4)
| 1973 | Tehran | Clay | R32 | Allan Stone | 6-1 6-3 |
| 1973 | Haverford | Grass | R32 | Terry Ryan | 7-6 3-6 7-6 |
| 1969 | Southampton | Grass | QF | Allan Stone | 6-4 6-3 |
| 1969 | Cincinnati | Clay | R64 | Allan Stone | 7-5 7-9 6-2 |
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.