Head to head
2
Hard
0
9
Clay
5
3
Grass
0
3
Carpet
3
Ilie Nastase's wins on the left · Manuel Orantes's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (25)
| 1979 | Roland Garros | Clay | R128 | Manuel Orantes | 4-6 6-4 6-1 6-2 |
| 1979 | Dorado Beach WCT | Hard | RR | Ilie Nastase | 6-4 6-4 |
| 1976 | WCT Challenge Cup | Carpet | SF | Ilie Nastase | 6-2 2-6 6-2 6-1 |
| 1976 | WCT Challenge Cup | Carpet | RR | Manuel Orantes | 7-5 3-6 6-4 |
| 1976 | Pepsi Grand Slam | Clay | F | Ilie Nastase | 6-4 6-3 |
| 1975 | Masters | Carpet | RR | Ilie Nastase | 3-6 6-4 6-4 |
| 1975 | US Open | Clay | QF | Manuel Orantes | 6-2 6-4 3-6 6-3 |
| 1975 | Toronto-2 | Clay | F | Manuel Orantes | 7-6 6-0 6-1 |
| 1975 | Davis Cup EUR SF: ESP vs ROU | Clay | RR | Ilie Nastase | 6-2 6-2 6-4 |
| 1975 | Hamburg | Clay | SF | Manuel Orantes | 7-5 6-4 2-6 6-7 7-5 |
| 1975 | Madrid-1 | Clay | F | Ilie Nastase | 7-6 6-1 2-6 6-3 |
| 1975 | Valencia | Clay | F | Ilie Nastase | 6-3 6-0 |
| 1974 | Masters | Grass | RR | Ilie Nastase | 6-4 6-2 |
| 1974 | Barcelona-2 | Clay | F | Ilie Nastase | 8-6 9-7 6-3 |
| 1973 | Barcelona-2 | Clay | F | Ilie Nastase | 2-6 6-1 8-6 6-4 |
| 1973 | Cincinnati | Clay | F | Ilie Nastase | 5-7 6-3 6-4 |
| 1973 | Rome | Clay | F | Ilie Nastase | 6-1 6-1 6-1 |
| 1972 | Masters | Hard | RR | Ilie Nastase | 6-3 6-4 |
| 1972 | South Orange | Grass | F | Ilie Nastase | 6-4 6-4 |
| 1972 | Bastad | Clay | F | Manuel Orantes | 6-4 6-3 6-1 |
| 1972 | Wimbledon | Grass | SF | Ilie Nastase | 6-3 6-4 6-4 |
| 1972 | Washington-1 | Carpet | QF | Manuel Orantes | 6-7 7-6 6-0 |
| 1971 | Nice | Clay | SF | Ilie Nastase | 6-3 6-3 |
| 1971 | New York | Carpet | R16 | Ilie Nastase | 6-2 6-2 |
| 1969 | Macon | Carpet | QF | Manuel Orantes | 5-7 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.