A ballboy waits for his turn as Andrey Kuznetsov of Russia plays Benjamin Becker of Germany during their men’s single first round match at the French Open tennis tournament at Roland Garros in Paris, France, 22 May 2016. EPA/ROBERT GHEMENT

People sitting in the rain as the first round matches are interrupted at the French Open tennis tournament at Roland Garros in Paris, France, 22 May 2016. EPA/ETIENNE LAURENT

Kei Nishikori of Japan in action against Simone Bolelli of Italy during their men’s single first round match at the French Open tennis tournament at Roland Garros in Paris, France, 22 May 2016. EPA/YOAN VALAT

Lucie Safarova of the Czech Republic in action against Vitalia Diatchenko of Russia during their women’s single first round match at the French Open tennis tournament at Roland Garros in Paris, France, 22 May 2016. EPA/ETIENNE LAURENT

Dustin Brown of Germany in action against Dudi Sela of Israel during their men’s single first round match at the French Open tennis tournament at Roland Garros in Paris, France, 22 May 2016. EPA/Christophe Petit Tesson