Spanish player Rafael Nadal celebrates after winning the men's singles semi-final tennis match against Spanish player Roberto Bautista Agut at the Madrid Masters at the Magic Box (Caja Magica) sports complex in Madrid on May 10, 2014. Nadal won the match 6-4, 6-3
Rafael Nadal of Spain and Kei Nishikori of Japan hold their trophies after Nishikori retired injured in the third set in their final match during day nine of the Mutua Madrid Open tennis tournament at the Caja Magica on May 11, 2014 in Madrid, Spain.
Serena Williams of the United States on Crandon Park beach after her straight sets victory against Carla Suarez Navarro of Spain in the final during the Miami Open Presented by Itau at Crandon Park Tennis Center on April 4, 2015 in Key Biscayne, Florida.
Kei Nishikori of Japan shakes hands at the net after his straight sets victory against Andy Murray during their round robin match during the Barclays ATP World Tour Finals at the O2 Arena on November 9, 2014 in London, England.