Aryna Sabalenka (No. 1 ranking) will face Paula Badosa (No. 12) in the semifinals at the Australian Open on Thursday, January 23.Sabalenka secured a three-set victory over Anastasia Pavlyuchenkova

Paula Badosa thought she might retire due to a back injury. A year later, she's in to the semifinals against close friend Aryna Sabalenka.

Aryna Sabalenka, the world No. 1 and two-time champion at the Australian Open, survived a major scare against Anastasia Pavlyuchenkova to advance to the semifinals. Sabalenka was twice a break down in the deciding set,