By Shrivathsa Sridhar and Ian Ransom MELBOURNE (Reuters) -Defending champion Aryna Sabalenka and Madison Keys made sluggish starts on Thursday but sealed contrasting victories to set up an Australian Open final showdown that will pit two of the game's heavy hitters against each other.

Aryna Sabalenka’s bid for a third consecutive Australian Open championship will continue after she got past Anastasia Pavlyuchenkova 2-6, 6-2, 6-3 in a surprisingly difficult quarterfinal.