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’s bid for a third consecutive Australian Open championship will continue after she got past Anastasia Pavlyuchenkova in a surprisingly difficult quarterfinal.

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,