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. The final also marked the first time in the Open Era that three consecutive men's major finals went to five-sets, following the finals at the 2019 Wimbledon Championships and the 2019 US Open.

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.

Seeds
All seedings per ATP rankings. • 🇪🇸 Rafael Nadal (quarterfinals)

• 🇷🇸 Novak Djokovic (champion)

• Roger Federer (semifinals)

• 🇷🇺 Daniil Medvedev (fourth round)

• 🇦🇹 Dominic Thiem (final)

•  Stefanos Tsitsipas (third round)

• 🇩🇪 Alexander Zverev (semifinals)

• 🇮🇹 Matteo Berrettini (second round)

• 🇪🇸 Roberto Bautista Agut (third round)

• 🇫🇷 Gaël Monfils (fourth round)

• 🇧🇪 David Goffin (third round)

• 🇮🇹 Fabio Fognini (fourth round)

• 🇨🇦 Denis Shapovalov (first round)

• 🇦🇷 Diego Schwartzman (fourth round)

•  Stan Wawrinka (quarterfinals)

• 🇷🇺 Karen Khachanov (third round)

• 🇷🇺 Andrey Rublev (fourth round)

• 🇧🇬 Grigor Dimitrov (second round)

• 🇺🇸 John Isner (third round, retired)

• 🇨🇦 Félix Auger-Aliassime (first round)

• 🇫🇷 Benoît Paire (second round)

• 🇦🇷 Guido Pella (third round)

• 🇦🇺 Nick Kyrgios (fourth round)

• 🇷🇸 Dušan Lajović (third round)

•  Borna Ćorić (first round)

•  Nikoloz Basilashvili (second round)

• 🇪🇸 Pablo Carreño Busta (third round)

• 🇫🇷 Jo-Wilfried Tsonga (first round, retired)

• 🇺🇸 Taylor Fritz (third round)

• 🇬🇧 Dan Evans (second round)

• 🇵🇱 Hubert Hurkacz (second round)

• 🇨🇦 Milos Raonic (quarterfinals)

Seeded players
The following are the seeded players. Seedings are based on ATP rankings on 13 January 2020, while ranking and points before are as of 20 January 2020. Points after are as of 3 February 2020.

† This column shows either the player's points from the 2019 tournament or his 18th best result (shown in brackets). Only ranking points counting towards the player's ranking as of 13 January 2020 are reflected in the column.

Withdrawn players
The following players would have been seeded, but they withdrew from the event.

Wild cards
• 🇦🇺 Alex Bolt

• 🇫🇷 Hugo Gaston

• 🇦🇺 Andrew Harris

• 🇯🇵 Tatsuma Ito

• 🇺🇸 Michael Mmoh

• 🇦🇺 Christopher O'Connell

• 🇦🇺 Marc Polmans

• 🇦🇺 John-Patrick Smith

Protected ranking
• Lu Yen-hsun (71)

• 🇺🇸 Mackenzie McDonald (83)

• 🇨🇦 Vasek Pospisil (70)

• 🇩🇪 Cedrik-Marcel Stebe (95)

Qualifiers
• 🇫🇷 Elliot Benchetrit

• 🇺🇸 Christopher Eubanks

• 🇨🇴 Daniel Elahi Galán

• 🇩🇪 Peter Gojowczyk

• 🇸🇰 Norbert Gombos

• Tallon Griekspoor

•  Ernests Gulbis

• 🇫🇷 Quentin Halys

• 🇧🇾 Ilya Ivashka

• 🇪🇸 Pedro Martínez

• 🇦🇹 Dennis Novak

• 🇦🇺 Max Purcell

• 🇪🇬 Mohamed Safwat

•  Alejandro Tabilo

• 🇦🇷 Marco Trungelliti

• 🇪🇸 Mario Vilella Martínez

Lucky losers
• 🇷🇺 Evgeny Donskoy

• 🇮🇹 Lorenzo Giustino

• 🇮🇳 Prajnesh Gunneswaran

• 🇸🇰 Jozef Kovalík

Withdrawals
• 🇺🇦 Alexandr Dolgopolov (66 PR) → replaced by Lloyd Harris (99)

• 🇯🇵 Kei Nishikori (13) → replaced by 🇦🇺 James Duckworth (100)

• 🇦🇷 Juan Martín del Potro (22 PR) → replaced by 🇺🇸 Marcos Giron (102)

• 🇫🇷 Richard Gasquet (61) → replaced by 🇯🇵 Yūichi Sugita (103)

•  Nicolás Jarry (77) → replaced by 🇮🇳 Prajnesh Gunneswaran (LL)

• 🇦🇺 Alex de Minaur (18) → replaced by 🇷🇺 Evgeny Donskoy (LL)

• 🇫🇷 Lucas Pouille (22) → replaced by 🇸🇰 Jozef Kovalík (LL)

• 🇲🇩 Radu Albot (46) → replaced by 🇮🇹 Lorenzo Giustino (LL)
 * Notes

Championship match ratings
504 thousand on ESPN, in the USA.