1920 Australasian Championships – Singles

Pat O'Hara Wood defeated Ronald Thomas 6–3, 4–6, 6–8, 6–1, 6–3 in the final to win the men's singles tennis title at the 1920 Australasian Championships.

Key

 * Q = Qualifier
 * WC = Wild card
 * LL = Lucky loser
 * r = Retired