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The Australian Open heralds the start of the Grand Slam season in tennis — and Jannik Sinner and Aryna Sabalenka are odds-on favourites to begin 2025 with a tournament victory.

According to BetMGM online sportsbook, world No. 1 Sinner has emerged as the +115 favourite to capture the men’s title. The tournament’s defending champion, Sinner arrives in Melbourne at the top of his game but under a cloud of intrigue. The tennis world is abuzz over the possibility that Sinner could soon face...