2024 Australian Open – Men's singles

Jannik Sinner defeated Daniil Medvedev in the final, 3–6, 3–6, 6–4, 6–4, 6–3 to win the men's singles tennis title at the 2024 Australian Open. It was his first major singles title. Sinner became both the first Italian to win the Australian Open and the second Italian man in the Open Era to win a singles major, after Adriano Panatta at the 1976 French Open. He was the first new Australian Open champion in 10 years, since Stan Wawrinka in 2014. At 22, Sinner was the youngest champion and finalist at the event since Novak Djokovic in 2008, in what was the first Australian Open final since 2005 not to feature any of the Big Three. It was the second time Medvedev lost the Australian Open final after winning the first two sets, following his defeat to Rafael Nadal in 2022, making him the only player in the Open Era to lose two major finals after having a two-set lead, and the second in the Open Era to lose each of his first three finals at the Australian Open, after Andy Murray. Medvedev also set Open Era records for the most time spent playing at a singles major, at 24 hours and 17 minutes, and for the most sets played in a singles major, at 31.

Djokovic was the defending champion, but lost in the semifinals to Sinner. His loss ended a 33-match winning streak at the Australian Open (dating from the 2019 tournament) and marked his first-ever defeat in an Australian Open semifinal. By reaching a 58th major singles quarterfinal, Djokovic equalled Roger Federer's all-time record. Djokovic and Wawrinka were the only former champions to compete in the tournament.

Djokovic retained the world No. 1 singles ranking after Carlos Alcaraz lost in the quarterfinals. Medvedev was also in contention at the start of the tournament.

A record number of seeded players (30 of 32 seeds) advanced to the second round, for the first time since the introduction of the 32-seed system at the 2001 Wimbledon Championships. A record-breaking opening round saw 20 matches extended to five sets, the most for the tournament since the start of the Open Era. The tournament overall featured a record-equaling 35 five-set matches, tying the Open Era record set at the 1983 US Open.