American teenager Learner Tien produced one of the biggest upsets of the Australian Open, crushing three-time finalist Daniil Medvedev in straight sets to reach his first Grand Slam quarter-final and set up a last-eight clash with Alexander Zverev

World No. 1 Aryna Sabalenka advanced to the Australian Open quarter-finals with a straight-sets win over Canadian teenager Victoria Mboko, overcoming a stiff challenge to continue her dominant run in Melbourne