Head to head
1
Clay
1
John Alexander's wins on the left · Robert McKinley's on the right · bar lengths share one scale
All meetings (2)
| 1969 | Cincinnati | Clay | R64 | John Alexander | 6-2 6-4 |
| 1969 | Houston | Clay | R16 | Robert McKinley | 9-7 6-1 |
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.