Simona Halep from Romania returns the ball to Lara Arruabarrena from Spain during a Madrid Open tennis tournament match in Madrid, Spain, Wednesday May 7, 2014. (AP Photo/Andres Kudacki)
Simona Halep from Romania returns the ball to Lara Arruabarrena from Spain during a Madrid Open tennis tournament match in Madrid, Spain, Wednesday May 7, 2014. (AP Photo/Andres Kudacki)
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)