Bob Brett (13 November 1953 – 5 January 2021) was an Australian tennis coach. He coached Boris Becker. Becker won Wimbledon, the US Open and the Australian Open between 1989 and 1991 while Brett was his coach. Brett also coached Goran Ivanišević, Andrei Medvedev, Mario Ančić, Marin Čilić, and others. Brett spent 24 years on the ATP circuit. He was born in Melbourne, Victoria.