Germany's Alexander Zverev stunned second seed Carlos Alcaraz to reach the Australian Open semi-finals as a sublime display of serving took him to a 6-1, 6-3, 6-7(2) 6-4 victory in Melbourne on Wednesday. Zverev made an impressive start on Rod Laver Arena, dominating the opening set and dropping just two points on serve. The sixth seed maintained his solid form in the second set, breaking Alcaraz's serve twice as errors crept into the Spaniard's game. He will face Russian Daniil Medvedev in Friday's semi-final.