With her 2017 victory at the Australian Open, Serena Williams surpassed Steffi Graf to claim the most Open Era Grand Slam wins with an incredible 23. (She's still one win behind Margaret Court, who owns the overall record.) Serena's impact on the game and on women's sports as a whole is hard to exaggerate: her powerful playing style has revolutionized tennis, while her matter-of-fact (and well-deserved) confidence in her ability has urged other female athletes to follow in her footsteps. According to Forbes, she's currently the highest-paid female athlete in the world.
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