The 37-year-old’s fitness had been in doubt ahead of his last-four clash with Alexander Zverev at the Australian Open.

The fifth seed recovered from two sets to one down to reach round two.

Sinner beat Daniil Medvedev in the quarter-final with a 6-2 1-6 6-1 6-4 win.

The match assures a home player in the men’s final since Andy Roddick lost to Roger Federer 18 years ago.

The two-time major winner dropped just four games against American Wolf.

The 22-year-old Italian followed up his victory over Novak Djokovic by claiming the trophy in dramatic fashion.

Djokovic had to save four set points on his serve to avoid falling 2-1 down to home favourite Alexei Popyrin on Rod Laver Arena.