Head to head
0
Clay
2
1
Grass
0
Roy Barth's wins on the left · Barry MacKay's on the right · bar lengths share one scale
All meetings (3)
| 1970 | Washington | Clay | R64 | Barry MacKay | 6-1 6-4 |
| 1970 | Charlotte | Clay | R16 | Barry MacKay | 7-5 6-3 |
| 1969 | Boston-2 | Grass | R64 | Roy Barth | 7-5 6-4 |
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.