28‑Aug‑1979 | US Open | Hard | R128 | | 6 | (6)Guillermo Vilas [ARG] d. Parun | 6-1 6-2 7-6 | | | | | | | | | |
29‑May‑1978 | Roland Garros | Clay | R128 | | 2 | (2)Guillermo Vilas [ARG] d. Parun | 6-0 6-4 6-0 | | | | | | | | | |
28‑Nov‑1977 | Johannesburg WCT | Hard | R32 | | 2 | (1)Guillermo Vilas [ARG] d. Parun | 1-6 6-2 7-5 | | | | | | | | | |
17‑Aug‑1976 | Toronto | Clay | QF | | | (1)Guillermo Vilas [ARG] d. Parun | 6-4 6-7 6-2 | | | | | | | | | |
4‑Jun‑1975 | Roland Garros | Clay | QF | 20 | 3 | (4)Guillermo Vilas [ARG] d. (16)Parun | 6-2 6-2 7-6 | | | | | | | | | |
25‑May‑1975 | Rome | Clay | QF | 20 | 2 | (2)Guillermo Vilas [ARG] d. (7)Parun | 6-3 6-1 | | | | | | | | | |
10‑Dec‑1974 | Masters | Grass | RR | 29 | 9 | Guillermo Vilas [ARG] d. Parun | 7-5 3-6 11-9 | | | | | | | | | |
11‑Feb‑1974 | Bologna WCT | Carpet | R32 | 40 | 31 | Parun d. Guillermo Vilas [ARG] | DEF | | | | | | | | | |
14‑Aug‑1972 | Montreal / Toronto | Clay | R32 | | | Guillermo Vilas [ARG] d. Parun | 6-1 7-5 | | | | | | | | | |
30‑Jul‑1972 | Tanglewood | | R16 | | | Parun d. Guillermo Vilas [ARG] | 7-6 6-3 | | | | | | | | | |