Head to head
1
Hard
2
3
Clay
6
2
Carpet
4
John Alexander's wins on the left · Ilie Nastase's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (19)
| 1981 | Indianapolis | Clay | R32 | John Alexander | 6-3 6-2 |
| 1980 | WCT Invitational | Carpet | RR | Ilie Nastase | 7-6 6-2 |
| 1979 | Monte-Carlo WCT | Clay | QF | John Alexander | 6-3 5-7 6-4 |
| 1979 | Richmond WCT | Carpet | R32 | Ilie Nastase | 6-7 6-4 6-4 |
| 1978 | Forest Hills WCT | Clay | RR | Ilie Nastase | 6-2 6-2 |
| 1978 | St. Louis WCT | Carpet | R16 | John Alexander | 6-3 6-7 6-2 |
| 1977 | Rotterdam WCT | Carpet | QF | Ilie Nastase | 6-4 6-2 |
| 1976 | WCT Challenge Cup | Hard | RR | Ilie Nastase | 6-3 6-4 7-6 |
| 1976 | Atlanta WCT | Carpet | SF | Ilie Nastase | 7-5 6-2 |
| 1975 | Toronto-2 | Clay | QF | Ilie Nastase | 6-3 6-7 6-2 |
| 1975 | Tucson | Hard | F | John Alexander | 7-5 6-2 |
| 1974 | Monte-Carlo WCT | Clay | QF | Ilie Nastase | 7-6(6) 6-4 |
| 1974 | Miami WCT | Carpet | QF | John Alexander | 7-6(6) 6-3 |
| 1974 | Philadelphia WCT | Carpet | R64 | John Alexander | W/O |
| 1973 | Los Angeles | Hard | R16 | Ilie Nastase | 6-3 6-2 |
| 1973 | Cincinnati | Clay | QF | Ilie Nastase | 6-3 7-6 |
| 1970 | Kitzbuhel | Clay | QF | John Alexander | 6-2 3-6 6-1 |
| 1970 | Brussels | Clay | R16 | Ilie Nastase | 6-2 3-6 6-1 6-0 |
| 1968 | Rome | Clay | R32 | Ilie Nastase | 6-2 7-5 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.