Germain Gigounon of Belgium in action Richard Gasquet of France against during their first round match for the French Open tennis tournament at Roland Garros in Paris, France, 26 May 2015. EPA/ROBERT GHEMENT

Alexandr Dolgopolov of the Ukraine in action against Nicolas Almagro of Spain during their first round match for the French Open tennis tournament at Roland Garros in Paris, France, 26 May 2015. EPA/YOAN VALAT

Rafael Nadal of Spain in action against Quentin Halys of France during their first round match for the French Open tennis tournament at Roland Garros in Paris, France, 26 May 2015. EPA/YOAN VALAT

David Ferrer of Spain in action against Lukas Lacko of Slovakia during their first round match for the French Open tennis tournament at Roland Garros in Paris, France, 26 May 2015. EPA/ETIENNE LAURENT

Marin Cilic of Croatia in action against Robin Haase of the Netherlands during their first round match for the French Open tennis tournament at Roland Garros in Paris, France, 26 May 2015. EPA/CAROLINE BLUMBERG