Drake is betting big on Jannik Sinner, wagering $300,000 on the top-ranked men's tennis player in the world to win the U.S. Open. The rapper known for placing big bets on sporting events — and often losing them — posted on social media the screenshot of a betting slip from Tuesday afternoon. The six-figure gamble pays $507,000 if Sinner captures his fifth major championship and second at the U.S. Open.

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