Grand slam record-holder Roger Federer has breezed past Georgian Nikoloz Basilashvili in straight sets in his opening match at the Australian Open.
The 17-time major champion was in a different class to his 117th-ranked opponent and showcased his full arsenal of shots against the bemused Basilashvili in their first meeting.
French entertainer Jo-Wilfried Tsonga beat crowd favourite Marcos Baghdatis in four sets.
Tsonga, who reached the Australian Open final in 2008, won through 6-4, 4-6, 6-4, 6-2 in two hours, 26 minutes.
World number one Novak Djokovic has made a winning start to his Australian Open title defence, beating Hyeon Chung in straight sets to advance to the second round.In sweltering heat, Djokovic was seldom troubled by the world number 51, running out a 6-3, 6-1, 6-4 winner.
Djokovic was full of praise for his young opponent, but said he was planning to use the Australian Open to kickstart his 2016 in a similiar fashion to 2015.
Earlier, Japanese star Kei Nishikori powered past Germany's Philipp Kohlschreiber in straight sets.
The seventh seed won 6-4, 6-3, 6-3 in one hour and 55 minutes to set up a second-round clash with American Austin Krajicek.
Playing only his third grand slam tournament, the 25-year-old Krajicek made short work of Chinese qualifier Wu Di, winning 6-4, 6-1, 6-3.
Nishikori has a good recent record at Melbourne Park, having advanced to at least the last 16 in each of the past four years.
It was the first time in 11 appearances at the Australian Open that the 32-year-old Kohlschreiber had been beaten in the opening round.
Sixth seed Tomas Berdych also started in fine form, beating Yuki Bhambri 7-5, 6-1, 6-2.
Belgian 15th seed David Goffin overcame a slow start to down Ukraine's Sergiy Stakhovsky 3-6, 6-3, 6-4, 6-4.
Big-serving Croat Ivo Karlovic is the first seeded casualty, the number 22 seed retiring from his first-round match against Argentine Federico Delbonis while trailing 7-6 (7-4), 6-4, 2-1.