won his fifth Australian Open title, and 18th Major title overall, defeating Rafael Nadal in the final 6–4, 3–6, 6–1, 3–6, 6–3 to win the Men's Singles tennis title at the 2017 Australian Open. With the win, Federer became the first male player to win at least five titles at three Grand Slam tournaments. The win was also Federer's first title on the ATP tour in over 12 months; his last win was at Basel on 1 November 2015. This was also the first Grand Slam tournament since the 2002 US Open in which Federer was ranked outside the top-10. He went on to reach and win the final of the tournament, making him the oldest man to reach a Grand Slam final since Ken Rosewall made the 1974 US Open final at the age of 39, and the oldest Slam champion since Ken Rosewall had won the 1972 Australian Open at 37 years and 63 days old. Nadal was attempting to become the first male player in the Open Era and the third man ever to achieve a double career Grand Slam. Novak Djokovic was the two-time defending champion, but lost in the second round to the 117th ranked Denis Istomin from Uzbekistan. It was the first time since the 2008 Wimbledon Championships, where he lost to Marat Safin, that Djokovic failed to make it past the second round of a major and the first time since the 2006 Australian Open that he failed to make it to the third round in Melbourne. This was the first Grand Slam tournament in which Andy Murray started as World No. 1 and top seed. Murray retained the top ranking despite losing to Mischa Zverev in the fourth round, because second seeded Djokovic needed to win the tournament to regain the No. 1 ranking, but lost in the second round. This was the first time since the 2004 French Open that the top two men's seeds both failed to reach the quarterfinals of a Grand Slam event. It was the last Grand Slam tournament for 2010 French Open Semifinalist and former World No. 8 Jürgen Melzer, who lost in the 1st Round against eventual champion Roger Federer, and former World No. 8 Radek Štěpánek.
Seeds
' Novak Djokovic ' Milos Raonic ' Stan Wawrinka ' Kei Nishikori ' Gaël Monfils ' Marin Čilić ' Dominic Thiem ' Rafael Nadal ' Tomáš Berdych ' David Goffin ' Jo-Wilfried Tsonga ' Roberto Bautista Agut ' Nick Kyrgios ' Grigor Dimitrov ' Lucas Pouille ' Roger Federer Richard Gasquet ' John Isner ' Ivo Karlović ' David Ferrer ' Pablo Cuevas ' Jack Sock ' Alexander Zverev ' Gilles Simon ' Albert Ramos-Viñolas ' Bernard Tomic ' Feliciano López ' Viktor Troicki ' Pablo Carreño Busta ' Sam Querrey ' Philipp Kohlschreiber
