PARIS (AP) — Even though her serve failed her repeatedly, Maria Sharapova is a French Open champion once again. Sharapova won her second title at Roland Garros in the last three years, overcoming 12 double-faults Saturday to beat fourth-seeded Simona Halep 6-4, 6-7 (5), 6-4 in the final. “This is the toughest Grand Slam final I’ve ever played,” Sharapova said on court. “Really, this tournament means so much to me. It’s a tournament, when I was young and growing up, I wanted to win. “To think that I’ve won it two times is, I don’t know. So emotional right now, I can’t even talk.” Sharapova has struggled with her serve this week and was broken seven times in the final on Court Philippe Chatrier. But she was able to hold off Halep, and hold her serve in the final game, with steady groundstrokes that kept the Romanian on the run. After Sharapova’s final forehand forced an error from Halep’s backhand, the Russian dropped to her knees and buried her face in her hands. She then looked to her team in the stands before shaking hands with Halep at the net. Once the formalities were done, she climbed into the stands…