Jannik Sinner is wary of "physical beast" Alexander Zverev as the Italian bids to join an elite group with back-to-back Australian Open titles in a final that features the world's top two players.
The ice-cool runaway world No. 1 goes into Sunday's Melbourne Park decider on a 20-match win streak, dropping just two sets in his six matches so far.
Sinner is the favorite to secure a third Grand Slam crown and second at the Australian Open after his maiden triumph over Daniil Medvedev last year.
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