A glance at the French Open, the year's second Grand Slam tennis tournament:
Site: Roland Garros in Paris.
Surface: Red clay.
Schedule: Play begins Sunday on all courts at 11 a.m. local time (5 a.m. EDT). The 15-day tournament closes with the women's singles final June 6, and the men's singles final June 7.
2014 Men's Singles Champion: Rafael Nadal of Spain.
2014 Women's Singles Champion: Maria Sharapova of Russia.
Last Year: Nadal beat Novak Djokovic of Serbia 3-6, 7-5, 6-2, 6-4 to win his ninth French Open championship and fifth in a row - both tournament records - and improve his career mark at Roland Garros to 66-1. Sharapova defeated Simona Halep of Romania 6-4, 6-7 (5), 6-4 for her second French Open title in three years.
Key Statistic I: 5. Number of losses on clay already in 2015 for Nadal, the first time he's lost more than three in a year since going 11-6 on the surface in 2003.
Key Statistic II: 22. Djokovic's winning streak entering the French Open.
Key Statistic III: 19. Grand Slam singles titles for Serena Williams, third-most in tennis history.
Prize Money: Total is 28 million euros (about $31 million), an increase of 3 million euros (about $3.3 million) from 2014, with 1.8 million euros (about $2 million) each to the men's and women's singles champions.