who won the 2017 men's singles australian open tennis tournament
2017 Australian Open – Men's Singles Roger Federer won his fifth Australian Open title, and 18th Major title overall, defeating Rafael Nadal in the final in five sets. With the win, Federer became the first male player to win at least five titles at three Grand Slam tournaments (five at the Australian Open, seven at Wimbledon and five at the US Open).
Novak Djokovic Djokovic started the year by playing the Hopman Cup with fellow Serbian world No. 3 Jelena Janković. While he won all his round-robin matches, the team lost 1–2 in the final to the second-seeded American team of Serena Williams and Mardy Fish. At the Australian Open, Djokovic reached his second consecutive Grand Slam final without dropping a set, including a victory over two-time defending champion Federer in the semi-finals.[70] By reaching the semi-finals, Djokovic became the youngest player to have reached the semi-finals in all four Grand Slam events.[71] In the final, Djokovic defeated unseeded Frenchman Jo-Wilfried Tsonga in four sets to earn his first Grand Slam singles title.[72] This marked the first time since the 2005 Australian Open that a Grand Slam singles title was not won by Federer or Nadal.[72]
2018 Australian Open – Men's Singles Roger Federer was the defending champion and successfully defended his title, defeating Marin Čilić in the final, 6–2, 6–7(5–7), 6–3, 3–6, 6–1. It was Federer's 20th Grand Slam singles title and record-equalling sixth Australian Open men's singles title (tied with Roy Emerson and Novak Djokovic).[1] With the win, Federer became the first male player to win at least six titles at two Grand Slam tournaments (six at the Australian Open and eight at Wimbledon). Federer became the oldest man to win a Grand Slam singles title in the Open era since Ken Rosewall in 1972.[2] The time span between Federer's first Grand slam glory at Wimbledon and this latest, almost 15 years, is an Open era record in the men's singles field.[3] This was also the 10th time that Federer has defended a Grand Slam title, with the previous time being at the 2008 US Open. Čilić became the first Croatian player to reach a singles final at the Australian Open.[4]
2018 US Open – Men's Singles Novak Djokovic won the title, his third at the US Open and 14th Grand Slam title overall, tying Pete Sampras, defeating Juan Martín del Potro in the final, 6–3, 7–6(7–4), 6–3.[1][2]