Ian Vermaak
| Full name | Ian C. Vermaak |
|---|---|
| Country (sports) | South Africa |
| Born | 28 March 1933 Empangeni, Natal, South Africa |
| Died | 21 January 2025 (aged 91) |
| Turned pro | 1953 (amateur tour) |
| Retired | 1960 (brief periods of activity afterwards) |
| Plays | Right-handed (1-handed backhand) |
| Singles | |
| Career record | 169-86 |
| Career titles | 16 |
| Highest ranking | No. 10 (1959, Lance Tingay) |
| Grand Slam singles results | |
| French Open | F (1959) |
| Wimbledon | 4R (1960) |
| Doubles | |
| Grand Slam doubles results | |
| Wimbledon | QF (1960) |
| Mixed doubles | |
| Grand Slam mixed doubles results | |
| Wimbledon | 4R (1959) |
| Team competitions | |
| Davis Cup | QF (1959(EU)) |
Ian Clyde Vermaak (28 March 1933 – 21 January 2025) was a tennis player competing for South Africa.