Spain’s Marcel Granollers returns the ball to Australia’s Marinko Matosevic during their first round match of the Conde de Godo tennis tournament in Barcelona, northeastern Spain, 20 April 2015. EPA/ALEJANDRO GARCIA

Ana Ivanovic of Serbia reacts duering her first round match against Caroline Garcia of France at the WTA tennis tournament in Stuttgart, Germany, 21 April 2015. EPA/MARIJAN MURAT

Spanish tennis player Rafael Nadal in action during a training session of the Conde de Godo tennis tournament in Barcelona, northeastern Spain, 20 April 2015. EPA/ALEJANDRO GARCIA

Spanish tennis player Rafael Nadal (C-R) and Japan’s Key Nishikori (C-L) pose for photographers in front of the Hospital de la Santa Creu i Sant Pau during the presentation of the Conde de Godo tennis tournament in Barcelona, northeastern Spain, 20 April 2015. EPA/ALEJANDRO GARCIA

Carla Suarez Navarro of Spain returns the ball to Evgeniya Rodina of Russia during their first round match at the WTA tennis tournament in Stuttgart, Germany, 21 April 2015. EPA/MARIJAN MURAT