Defending champion Jannik Sinner overcame an early test against American Ben Shelton to reach his second straight Australian Open final, winning 7-6 (2), 6-2, 6-2.

The win sets up a showdown with Alexander Zverev of Germany in Sunday’s final. Earlier Friday, Zverev won the first set of his semifinal when Novak Djokovic missed a putaway volley in a tiebreak. Djokovic retired on the spot, unable to overcome the muscle tear he suffered in his quarterfinal win over Carlos Alcaraz Tuesday night.

The top two seeds clash in the final as defending champion Sinner goes for back-to-back Australian Open titles