Head to head
0
Clay
1
1
Grass
0
John Marks's wins on the left · John Lloyd's on the right · bar lengths share one scale
All meetings (2)
| 1976 | Bermuda | Clay | R16 | John Lloyd | 6-4 6-2 |
| 1975 | Sydney-2 | Grass | QF | John Marks | 6-4 3-6 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.