Alexandr Dolgopov of Ukraine celebrates after winning against Rafael Nadal of Spain in their first round match of the Aegon tennis championships at the Queens Club in London, Britain, 16 June 2015. EPA/FACUNDO ARRIZABALAGA

Canada’s Milos Raonic returns to Britain’s James Ward during their first round match for the Aegon tennis championships at the Queens Club in London, Britain, 15 June 2015. EPA/ANDY RAIN

Bulgaria’s Grigor Dimitrov returns to Sam Querrey of the USA during their first round match for the Aegon tennis championships at the Queens Club in London, Britain, 15 June 2015. EPA/ANDY RAIN

Rafael Nadal of Spain reacts after winning a point against Alexandr Dolgopov of Ukraine during the first round match of the Aegon tennis championships at the Queens Club in London, Britain 16 June 2015. EPA/FACUNDO ARRIZABALAGA

Nick Kyrgios of Australia returns the ball to Stan Wawrinka of Switzerland during the first round match of the Aegon tennis championships at the Queens Club in London, Britain 16 June 2015. EPA/FACUNDO ARRIZABALAGA