Head to head
1
Clay
0
0
Grass
1
John Yuill's wins on the left · Russell Simpson's on the right · bar lengths share one scale
All meetings (2)
| 1979 | Roland Garros | Clay | R128 | John Yuill | 3-6 6-1 5-7 6-2 6-3 |
| 1974 | Beckenham | Grass | R32 | Russell Simpson | 6-4 5-7 7-5 |
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.