2020 Australian Open – Men's singles

Defending champion Novak Djokovic defeated Dominic Thiem in the final, 6–4, 4–6, 2–6, 6–3, 6–4 to win the men's singles tennis title at the 2020 Australian Open. It was his record-extending eighth Australian Open title and 17th major title overall. With the win, Djokovic regained the world No. 1 singles ranking, and became the first player since Ken Rosewall to win major titles in three different decades, and the first to do so in the Open Era. The match also marked the first time Djokovic came back to win a major final after trailing two sets to one, having lost each of the last seven times this happened. Thiem became the first Austrian to reach the final. This was Thiem's third runner-up finish in as many major finals.

This was the final Australian Open appearance for former world No. 1, six-time champion, and 20-time major champion Roger Federer. With his third-round win, Federer became the first player to win 100 matches at the Australian Open. He also became the first player to have at least 100 wins at two majors (the other being Wimbledon). Federer's semifinal encounter with Djokovic marked their 50th and final professional meeting; Djokovic won to end their head-to-head at 27–23 in his favor.