French Open

Workers sweep water off a tarp as rain interrupts a men's singles match between Djokovic of Serbia and Sousa of Portugal at the French Open tennis tournament at the Roland Garros stadium in Paris...Workers sweep water off a tarp as rain interrupts a men's singles match between Novak Djokovic of Serbia and Joao Sousa of Portugal at the French Open tennis tournament at the Roland Garros stadium in Paris May 26, 2014.     REUTERS/Gonzalo Fuentes

Gonzalo Fuentes/Reuters

Workers sweep water off tarpaulin as rain interrupts the men’s singles match between Novak Djokovic of Serbia and Joao Sousa of Portugal at the French Open tennis tournament, Roland Garros stadium, Paris

Roger Federer of Switzerland serves to Somdev Devvarman of India during their men's singles match at the French Open tennis tournament at the Roland Garros stadium in Paris May 29, 2013.

Philippe Wojazer/Reuters

Roger Federer of Switzerland, the world-ranked number 3 player, serves to Somdev Devvarman of India, ranked 188, during their men’s singles match at the French Open tennis tournament at the Roland Garros stadium in Paris on Wednesday

Spectators wear ponchos during a rainfall as they wait for a match at the French Open tennis tournament in Paris...Spectators wear ponchos during a rainfall as they wait for the start of the women's singles match between Coco Vandeweghe of the U.S. and Yaroslava Shvedova of Kazakhstan at the French Open tennis tournament at the Roland Garros stadium in Paris May 28, 2013.  REUTERS/Vincent Kessler (FRANCE  - Tags: SPORT TENNIS)

Vincent Kessler/Reuters

Spectators wear ponchos during the rain as they wait for the start of the women’s singles match between Coco Vandeweghe of the U.S. and Yaroslava Shvedova of Kazakhstan at the French Open tennis tournament at the Roland Garros stadium in Paris on Tuesday. Read more