Madrid

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Dominic Thiem from Austria returns the ball during a Madrid Open tennis tournament match against Stanislas Wawrinka from Switzerland, in Madrid, Spain, Tuesday, May 6, 2014. (AP Photo/Andres Kudacki)

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Stanislas Wawrinka from Switzerland claps his racket as Dominic Thiem from Austria wins a point during a Madrid Open tennis tournament match, in Madrid, Spain, Tuesday, May 6, 2014. (AP Photo/Andres Kudacki)

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David Ferrer from Spain returns the ball during a Madrid Open tennis tournament match against Albert Ramos from Spain, in Madrid, Spain, Tuesday, May 6, 2014. (AP Photo/Andres Kudacki)

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David Ferrer from Spain gestures during a Madrid Open tennis tournament match against Albert Ramos from Spain, in Madrid, Spain, Tuesday, May 6, 2014. (AP Photo/Andres Kudacki)

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Milos Raonic from Canada returns the ball during a Madrid Open tennis tournament match against Jeremy Chardy from France, in Madrid, Spain, Tuesday, May 6, 2014. (AP Photo/Andres Kudacki)

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Dominic Thiem from Austria look up as he celebrates his victory during a Madrid Open tennis tournament match against Stanislas Wawrinka from Switzerland, in Madrid, Spain, Tuesday, May 6, 2014. (AP Photo/Andres Kudacki)

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Dominic Thiem from Austria celebrates his victory during a Madrid Open tennis tournament match against Stanislas Wawrinka from Switzerland, in Madrid, Spain, Tuesday, May 6, 2014. (AP Photo/Andres Kudacki)