$ 0 0 Serbia's Novak Djokovic, right, and Portugal's Joao Sousa smile after their first round match of the FrenchOpen tennis tournament at the Roland Garros stadium, in Paris, France, Monday, May 26, 2014. Djokovic won 6-1, 6-2, 6-4. Serbia's Novak Djokovic hits a return to Portugal's Joao Sousa during their French tennis Open first round match at the Roland Garros stadium in Paris on May 26, 2014.Novak Djokovic of Serbia serves to Joao Sousa of Portugal during their men's singles match at the FrenchOpen tennis tournament at the Roland Garros stadium in Paris May 26, 2014. Serbia's Novak Djokovic returns to Portugal's Joao Sousa during their French tennis Open first round match at the Roland Garros stadium in Paris on May 26, 2014. Joao Sousa of Portugal reacts during his men's singles match against Novak Djokovic of Serbia at the FrenchOpen tennis tournament at the Roland Garros stadium in Paris May 26, 2014.