Photos.

MADRID, SPAIN - MAY 04: Sloane Stephens of USA reacts in her match against Daniela Hantuchova of Slovakia during the Mutua Madrid Open tennis tournament at the Caja Magica on May 4, 2013 in Madrid, Spain. (Photo by Julian Finney/Getty Images)

In this taken photo with a slow shutter speed, David Ferrer, from Spain, returns the ball to Andreas Seppi, from Italy, during their Portugal Open semi final tennis match, in Oeiras, outside Lisbon, Saturday, May 4, 2013. Ferrer won the match 6-1, 6-4. (AP Photo/Francisco Seco)

MADRID, SPAIN - MAY 04: Madison Keys (R) of USA and Bethanie Mattek-Sands of USA meet at the net after their match against each other during the Mutua Madrid Open tennis tournament at the Caja Magica on May 4, 2013 in Madrid, Spain. (Photo by Julian Finney/Getty Images)

Spain's Carla Suarez Navarro sprays sparkling wine on a tournament official after playing the Portugal Open final tennis match with Russia's Anastasia Pavlyuchenkova Saturday, May 4 2013, in Oeiras, outside Lisbon. Pavlyuchenkova defeated Suarez Navarro 7-5, 6-2. (AP Photo/Armando Franca)

Germany's Tommy Haas returns the ball to Ivan Dodig of Croatia during their semi final match at the BMW Open tennis tournament in Munich, Germany, Saturday, May 4, 2013. Haas defeated Dodig with 6-4 and 6-3. (AP Photo/dpa, Marc Mueller)

Anastasia Pavlyuchenkova, from Russia, lifts up her trophy during an award ceremony after winning the Portugal Open tennis tournament in Oeiras, outside Lisbon, Saturday, May 4, 2013. Pavlyuchenkova defeated Spanish Carla Suarez Navarro 7-5, 6-2. (AP Photo/Francisco Seco)