The irresistible force of Aryna Sabalenka meets the unbreakable spirit of Madison Keys in an Australian Open women's singles final on Saturday that promises to be a thunderous slugfest. Defending champion Sabalenka was hailed by beaten semi-finalist Paula Badosa as being so good it was "like she's playing a PlayStation" after dishing out a merciless straight-sets bludgeoning to her good friend. The never-say-die American Keys, who will turn 30 next month, saved eight break points and a match point in a nerve-shredding final set against Iga Swiatek that went all the way to a 10-point tiebreak.