The cat fight between Serena Williams and Maria Sharapova has heated up! It all started during an interview that Serena did with Rolling Stone magazine. She allegedly made some snarky remarks about Maria and her relationship with rumored ex, Grigor Dimitrov. Then Maria shot back during a press conference saying maybe Serena should worry about her own personal life drama before she makes comments about anyone else's. Almost immediately Serena apologized to Maria for the comments, suggesting that it was the reporter's fault for assuming they were about Maria in the first place.