Head to head
1
Hard
0
1
Clay
0
John Alexander's wins on the left · Willem Prinsloo's on the right · bar lengths share one scale
All meetings (2)
| 1977 | Toronto-2 | Clay | R32 | John Alexander | 6-1 6-1 |
| 1971 | Johannesburg | Hard | R64 | John Alexander | 6-1 6-2 6-3 |
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.