Head to head
1
Hard
1
4
Clay
3
0
Grass
1
Manuel Orantes's wins on the left · John Alexander's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (10)
| 1981 | South Orange | Clay | R16 | Manuel Orantes | 6-4 6-4 |
| 1980 | Rome | Clay | R32 | Manuel Orantes | 7-5 6-7 6-2 |
| 1977 | North Conway | Clay | F | John Alexander | 2-6 6-4 6-4 |
| 1975 | Boston | Clay | QF | John Alexander | 6-3 2-6 7-6 |
| 1974 | Louisville | Clay | QF | Manuel Orantes | 6-4 6-1 |
| 1974 | Johannesburg WCT | Hard | R16 | John Alexander | 2-6 6-3 6-2 |
| 1973 | Toronto-2 | Clay | R16 | Manuel Orantes | 7-5 6-3 |
| 1972 | Los Angeles-2 | Hard | R16 | Manuel Orantes | 6-4 6-7 7-6 |
| 1970 | Kitzbuhel | Clay | SF | John Alexander | 6-3 6-3 6-4 |
| 1968 | Brisbane | Grass | R32 | John Alexander | 10-8 7-9 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.