| 21‑Jun‑1971 | Wimbledon | Grass | R64 | | | Roy Emerson [AUS] d. (Q)Doerner | 4-6 6-2 8-6 6-1 | | | | | | | | | |
| 21‑Jun‑1971 | Wimbledon | Grass | R128 | | | (Q)Doerner d. Keishiro Yanagi [JPN] | 6-2 6-2 3-6 6-0 | | | | | | | | | |
| 5‑Apr‑1971 | Johannesburg | Hard | R64 | | | Robert Maud [RSA] d. Doerner | 6-2 6-2 6-2 | | | | | | | | | |
| 5‑Apr‑1971 | Johannesburg | Hard | R128 | | | Doerner d. Andre Van Der Merwe A [RSA] | 3-6 6-2 6-4 2-6 6-2 | | | | | | | | | |
| 29‑Mar‑1971 | Durban | Hard | R32 | | | Raymond Moore [RSA] d. Doerner | 6-2 6-4 | | | | | | | | | |
| 29‑Mar‑1971 | Durban | Hard | R64 | | | Doerner d. Greg Muller [RSA] | 6-0 6-1 | | | | | | | | | |
| 23‑Jan‑1971 | Melbourne | Grass | R64 | | | Colin Stubs [AUS] d. Doerner | 6-3 7-5 6-0 | | | | | | | | | |
| 18‑Jan‑1971 | Sydney Outdoor | Hard | R32 | | | Mal Anderson [AUS] d. Doerner | 6-4 6-3 6-0 | | | | | | | | | |
| 18‑Jan‑1971 | Sydney Outdoor | Hard | R64 | | | Doerner d. Howard Humphries [AUS] | 3-6 7-5 6-3 | | | | | | | | | |
| 10‑Jan‑1971 | Hobart | Hard | QF | | | Alex Metreveli [RUS] d. Doerner | 6-2 6-3 | | | | | | | | | |
| 10‑Jan‑1971 | Hobart | Hard | R16 | | | Doerner d. John Cooper [AUS] | 7-5 6-4 | | | | | | | | | |
| 10‑Jan‑1971 | Hobart | Hard | R32 | | | Doerner d. Jun Kamiwazumi [JPN] | 6-4 6-3 | | | | | | | | | |