Defending champion: Novak Djokovic (7-time winner (2008, 2011-13, 2015-16 & 2019))
Former AO champions, who will participating in the 2020 edition: Roger Federer (2004, 2006-07, 2010 & 2017-18), Rafael Nadal (2009), Stan Wawrinka (2014)
Official website: http://www.ausopen.com/
Wiki-link...