Spinner Nathan Lyon starred with a match haul of nine wickets as Australia wrapped up the opening Test on Friday with a crushing victory over Sri Lanka before lunch on the third day.
The hosts were bundled out for 113 in their second innings allowing the Australians to seal a 10-wicket victory in their first over back at the crease in Galle.
It was a huge victory for Australia, who suffered a 3-0 whitewash in Sri Lanka on their last tour in 2016.
Opener Usman Khawaja (71) and Cameron Green (77) stood out in Australia's first innings effort of 321 that made them take control in extreme spin conditions.
Green put on crucial partnerships with Khawaja and then wicketkeeper-batsman Alex Carey, who made 45, to handle the spinners with aplomb.
Sri Lanka suffered a blow before play began when Angelo Mathews was ruled out due to Covid-19, with Oshada Fernando named his replacement.
Skipper Dimuth Karunaratne started strong, smashing four boundaries in the 17-run first over of the innings off Mitchell Starc.
The leg-spinner then got Oshada caught out in the 12th over as Sri Lanka slipped to 63-4. Wickets kept tumbling with Sri Lanka's batsmen desperately trying to hit their way out of trouble.
Earlier in the day, fast bowler Asitha Fernando took Australia's last two first-innings wickets with the tourists adding eight to their overnight 313, for a commanding lead of 109.
The third day started early after abysmal weather shortened play on Thursday, with strong winds collapsing a spectator stand.