Head to head
2
Hard
1
4
Clay
2
1
Grass
0
4
Carpet
3
Cliff Drysdale'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 (17)
| 1977 | Rotterdam WCT | Carpet | QF | Mark Cox | 6-3 6-3 |
| 1977 | Philadelphia WCT | Carpet | R32 | Cliff Drysdale | 6-3 6-1 |
| 1975 | Tucson | Hard | R32 | Cliff Drysdale | 6-3 7-6 |
| 1975 | Memphis WCT | Carpet | R16 | Mark Cox | 7-5 6-2 |
| 1972 | Rome WCT | Carpet | QF | Cliff Drysdale | 6-4 6-3 |
| 1972 | Cleveland WCT | Carpet | SF | Mark Cox | 3-6 6-3 7-6 |
| 1972 | Louisville WCT | Clay | SF | Mark Cox | 7-5 6-0 |
| 1972 | Houston WCT | Clay | R32 | Mark Cox | 6-3 6-2 |
| 1972 | Hollywood WCT | Clay | QF | Cliff Drysdale | 6-4 6-2 |
| 1971 | Bologna WCT | Carpet | R32 | Cliff Drysdale | 6-3 7-6 |
| 1971 | Barcelona WCT | Clay | R32 | Cliff Drysdale | 6-0 6-3 |
| 1971 | Midland | Hard | SF | Mark Cox | 6-1 7-5 |
| 1971 | Toronto WCT | Clay | R16 | Cliff Drysdale | 6-3 7-6 |
| 1970 | Wembley | Carpet | R16 | Cliff Drysdale | 9-8 6-3 |
| 1970 | Durban | Hard | SF | Cliff Drysdale | 4-6 6-2 8-6 6-4 |
| 1969 | Wimbledon | Grass | R32 | Cliff Drysdale | 6-2 11-9 6-4 |
| 1968 | Hamburg | Clay | R16 | Cliff Drysdale | 6-4 6-4 1-6 4-6 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.