Head to head
1
Clay
0
3
Carpet
0
John Alexander's wins on the left · Roy Barth's on the right · bar lengths share one scale
All meetings (4)
| 1973 | Gothenburg WCT | Carpet | R32 | John Alexander | 2-0 RET |
| 1973 | Atlanta WCT | Carpet | R32 | John Alexander | 6-2 6-1 |
| 1973 | Richmond WCT | Carpet | R32 | John Alexander | 6-2 6-2 |
| 1968 | Munich | Clay | R32 | John Alexander | 6-3 13-11 |
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.