24‑May‑1971 | Berlin | Clay | F | | | Kuhnke d. Manuel Santana [ESP] | 6-2 7-9 0-6 7-5 4-4 RET | | | | | | | | | |
14‑Aug‑1970 | Davis Cup EUR F: FRG vs ESP | | RR | | | Kuhnke d. Manuel Santana [ESP] | 6-4 6-8 12-10 6-2 | | | | | | | | | |
22‑Jun‑1964 | Wimbledon | Grass | R16 | | | Kuhnke d. Manuel Santana [ESP] | 6-3 7-5 6-8 6-4 | | | | | | | | | |
26‑Jun‑1963 | Wimbledon | Grass | QF | | | Manuel Santana [ESP] d. Kuhnke | 6-3 6-4 6-4 | | | | | | | | | |
3‑May‑1963 | Davis Cup EUR R1: FRG vs ESP | | RR | | | Manuel Santana [ESP] d. Kuhnke | 6-2 6-4 6-0 | | | | | | | | | |
28‑Jan‑1963 | Durban | Hard | QF | | | Kuhnke d. Manuel Santana [ESP] | 6-4 6-2 8-6 | | | | | | | | | |
30‑Jul‑1962 | Hamburg | Clay | QF | | | Manuel Santana [ESP] d. Kuhnke | 6-4 6-3 6-4 | | | | | | | | | |
17‑May‑1960 | Roland Garros | Clay | R64 | | | Manuel Santana [ESP] d. Kuhnke | 7-5 4-6 3-6 6-1 6-4 | | | | | | | | | |