After 1 poor set, Nadal plays nearly perfectly, sets up French Open semifinal against Murray

The Associated Press

Spain's Rafael Nadal celebrates winning the quarterfinal match of the French Open tennis tournament against compatriot David Ferrer at the Roland Garros stadium, in Paris, France, Wednesday, June 4, 2014. Nadal won in four sets 4-6, 6-4, 6-0, 6-1. (AP Photo/Michel Euler)

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She made it to the top 10 in 2011, when she was the only woman to reach three major quarterfinals (although she went 0-3). In late 2012, she hurt her right knee, and her ranking plummeted to 177th last year. But she's worked her way back, and after eliminating Errani, the gregarious Petkovic kissed her racket — something she said she'd never done before.

"I don't know what happened to me. I was just overwhelmed by emotion," Petkovic said. "I had no boy to kiss, so I kissed my racket, right?"

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