13‑Feb‑1978 | Palm Springs | Hard | R16 | 14 | 75 | (5)Nastase d. Cliff Richey [USA] | 6-2 7-5 | | | | | | | | | |
21‑Jul‑1975 | Washington | | QF | 8 | 22 | Cliff Richey [USA] d. (3)Nastase | 7-6 6-5 RET | | | | | | | | | |
17‑Jun‑1974 | Nottingham | Grass | R64 | 3 | 27 | (2)Nastase d. Cliff Richey [USA] | W/O | | | | | | | | | |
14‑Jan‑1974 | Lakeway | Hard | SF | 1 | 19 | Cliff Richey [USA] d. Nastase | 6-1 6-1 | | | | | | | | | |
5‑Mar‑1972 | Hampton | Hard | SF | | | Nastase d. Cliff Richey [USA] | 3-6 6-0 6-2 | | | | | | | | | |
4‑Dec‑1971 | Masters | Carpet | RR | | | Nastase d. Cliff Richey [USA] | 5-7 6-4 8-6 | | | | | | | | | |
27‑Jan‑1971 | Omaha | Carpet | F | | | Nastase d. Cliff Richey [USA] | 6-4 6-3 6-1 | | | | | | | | | |
18‑Jul‑1970 | Washington | Hard | SF | | | Cliff Richey [USA] d. Nastase | 6-3 6-2 | | | | | | | | | |
22‑Jun‑1970 | Wimbledon | Grass | R64 | | | (8)Nastase d. Cliff Richey [USA] | 7-5 1-6 2-6 6-4 6-3 | | | | | | | | | |
26‑May‑1970 | Roland Garros | Clay | QF | | | (8)Cliff Richey [USA] d. (1)Nastase | 7-5 9-7 4-6 6-3 | | | | | | | | | |
12‑May‑1970 | Brussels | Clay | SF | | | Nastase d. Cliff Richey [USA] | 6-0 6-4 6-2 | | | | | | | | | |
15‑Feb‑1970 | Salisbury | Hard | F | | | Nastase d. Cliff Richey [USA] | 6-8 3-6 6-4 9-7 6-0 | | | | | | | | | |
9‑Feb‑1970 | New York | Carpet | RR | | | Nastase d. Cliff Richey [USA] | 6-4 | | | | | | | | | |
28‑Jan‑1970 | Omaha | Hard | QF | | | Cliff Richey [USA] d. Nastase | 6-2 6-3 | | | | | | | | | |