Defending women's singles champion Sofia Kenin has been knocked out of the Australian Open, losing in straight sets to Kaia Kanepi in the second round.
Estonian Kanepi, 35, dominated throughout, hitting 22 winners to Kenin's 10 and saving all seven break points she faced at Melbourne Park.
Kanepi will face Croat 28th seed Donna Vekic in the third round.
Meanwhile, world number one Ashleigh Barty overcame fellow Australian Daria Gavrilova 6-1 7-6 (9-7) to move into the next round.
Barty looked set for a routine win when she served for the match at 6-1 5-2 but Gavrilova broke twice to force a second-set tie-break.