How tough is it to play against a close friend? 'Soulmates' Aryna Sabalenka and Paula Badosa will find out in their Australian Open semi-final on Thursday.

Paula Badosa and Madison Keys will be out to prevent a dream Australian Open final when they face Aryna Sabalenka and Iga Swiatek, respectively, in Thursday's semi-finals at Melbourne Park. Sabalenka is on course to become the first woman to complete a "three-peat" since Swiss great Martina Hingis from 1997-90,

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.