5‑Oct‑1981 | Tel Aviv | Hard | R32 | 79 | | (4)Nastase d. Tom Okker [NED] | 4-6 6-4 7-6 | | | | | | | | | |
14‑Jul‑1980 | Stuttgart Outdoor | Clay | R32 | 57 | 87 | (7)Nastase d. Tom Okker [NED] | 6-4 6-3 | | | | | | | | | |
26‑Jun‑1978 | Wimbledon | Grass | QF | 10 | 30 | Tom Okker [NED] d. (9)Nastase | 7-5 6-1 2-6 6-3 | | | | | | | | | |
20‑Jun‑1977 | Wimbledon | Grass | R16 | 6 | 31 | (6)Nastase d. Tom Okker [NED] | 6-8 6-4 6-4 6-4 | | | | | | | | | |
28‑Mar‑1977 | London WCT | Hard | R16 | 5 | 23 | (2)Nastase d. Tom Okker [NED] | 7-6(5) 6-4 | | | | | | | | | |
11‑Mar‑1974 | Washington WCT | Carpet | F | 1 | 3 | (1)Nastase d. (2)Tom Okker [NED] | 6-3 6-3 | | | | | | | | | |
11‑Feb‑1974 | Toronto WCT | Carpet | F | 1 | 4 | Tom Okker [NED] d. (1)Nastase | 6-3 6-4 | | | | | | | | | |
14‑Jan‑1974 | Lakeway | Hard | QF | 1 | 4 | Nastase d. Tom Okker [NED] | 6-4 2-6 7-6 | | | | | | | | | |
4‑Dec‑1973 | Masters | Carpet | F | 1 | 4 | Nastase d. Tom Okker [NED] | 6-3 7-5 4-6 6-3 | | | | | | | | | |
17‑Nov‑1973 | London | Carpet | F | 1 | 5 | Tom Okker [NED] d. Nastase | 6-3 6-4 | | | | | | | | | |
29‑Oct‑1973 | Paris Indoor | Hard | SF | 1 | 6 | Nastase d. Tom Okker [NED] | 7-6 6-2 7-5 | | | | | | | | | |
21‑Oct‑1973 | Madrid | Clay | SF | 1 | 6 | Tom Okker [NED] d. Nastase | 6-4 1-6 7-5 | | | | | | | | | |
30‑Sep‑1973 | Chicago | Carpet | SF | 1 | 6 | Tom Okker [NED] d. Nastase | 3-6 6-3 6-3 | | | | | | | | | |
17‑Sep‑1973 | Los Angeles | Hard | SF | 1 | 8 | Tom Okker [NED] d. (2)Nastase | 2-6 7-5 6-2 | | | | | | | | | |
18‑May‑1973 | Davis Cup EUR QF: NED vs ROU | Clay | RR | | | Nastase d. Tom Okker [NED] | 6-4 6-2 6-4 | | | | | | | | | |
4‑Nov‑1972 | Stockholm | Hard | SF | | | (3)Tom Okker [NED] d. (2)Nastase | 6-4 6-7 6-4 | | | | | | | | | |
5‑Apr‑1971 | Monte Carlo | Clay | F | | | (3)Nastase d. (1)Tom Okker [NED] | 3-6 8-6 6-1 6-1 | | | | | | | | | |
17‑Aug‑1970 | Hamburg | Clay | F | | | (1)Tom Okker [NED] d. (3)Nastase | 4-6 6-3 6-3 6-4 | | | | | | | | | |
12‑May‑1970 | Brussels | Clay | F | | | Tom Okker [NED] d. Nastase | 6-3 6-4 0-6 4-6 6-4 | | | | | | | | | |
6‑May‑1968 | Rome | Clay | R16 | | | (4)Tom Okker [NED] d. (13)Nastase | 6-3 5-7 6-2 6-3 | | | | | | | | | |