Head to head
1
Hard
0
1
Clay
1
0
Grass
1
1
Carpet
3
John Alexander's wins on the left · Mark Cox's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (8)
| 1977 | Wimbledon | Grass | R64 | Mark Cox | 8-6 6-4 7-5 |
| 1975 | Atlanta WCT | Carpet | F | Mark Cox | 6-3 7-6(3) |
| 1975 | Washington WCT | Carpet | QF | Mark Cox | 7-5 6-3 |
| 1972 | Fort Worth WCT | Hard | R32 | John Alexander | 6-4 6-3 |
| 1972 | Bretton Woods WCT | Clay | R32 | John Alexander | 6-3 6-3 |
| 1972 | Philadelphia WCT | Carpet | R32 | John Alexander | 7-6 3-6 6-3 |
| 1971 | Cologne WCT | Carpet | R32 | Mark Cox | 7-6 6-3 |
| 1968 | Munich | Clay | R16 | Mark Cox | 6-4 6-2 |
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.