One of the major highlights on the Tennis calendar is underway in Melbourne - the Australian Open. 

Top seed and defending champion Jannik Sinner is a favourite to win and straight into it tomorrow in the first round.

10 time champion Novak Jokic will also have fans abuzz as he goes for his 25th major. 

Two-time defending champion Aryna Sabalenka is headlining the opening night of the tournament tonight, as she attempts a three-in-a-row win - a record last set in 1999. 

Tennis commentator Craig Gabriel joins the show. 

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