1981 Australian Open – Men's singles
| Men's singles | |
|---|---|
| 1981 Australian Open | |
| Champion | Johan Kriek |
| Runner-up | Steve Denton |
| Score | 6–2, 7–6(7–1), 6–7(1–7), 6–4 |
| Draw | 64 |
| Seeds | 16 |
Johan Kriek defeated Steve Denton in the final, 6–2, 7–6(7–1), 6–7(1–7), 6–4 to win the men's singles tennis title at the 1981 Australian Open. It was his first major title, becoming the first South African to win a singles major. Kriek was making his tournament debut.
Brian Teacher was the reigning champion, but did not compete this year.