PARIS (AP) A glance at the French Open, the year's second Grand Slam tennis tournament:
Where: Roland Garros, Paris, France.
Surface: Red clay.
Schedule: Play begins Sunday on all courts at 11 a.m. local time (0900 GMT, 5 a.m. EDT). The 15-day tournament closes with the women's singles final June 4, and men's singles final June 5.
Top Players On Court Sunday: No. 5 Kei Nishikori vs. Simone Bolelli, No. 8 Milos Raonic vs. Janko Tipsarevic, No. 15 John Isner vs. John Millman, No. 17 Nick Kyrgios vs. Marco Cecchinato; No. 4 Garbine Muguruza vs. Anna Karolina Schmiedlova, No. 6 Simona Halep vs. Nao Hibino, No. 10 Petra Kvitova vs. Danka Kovinic, No. 11 Lucie Safarova vs. Vitalia Diatchenko
Sunday's Forecast: Rain. High of 63 degrees (17 C).
2015 Men's Singles Champion: Stan Wawrinka of Switzerland.
2015 Women's Singles Champion: Serena Williams of the United States.
Last Year: Wawrinka used his terrific one-handed backhand to upset Novak Djokovic 4-6, 6-4, 6-3, 6-4, thanks in large part to a 60-30 edge in winners, for his second Grand Slam title and first in Paris. It was Djokovic's third loss in the past four finals at Roland Garros, the only major tournament he hasn't won. Williams collected her third French Open trophy by beating Lucie Safarova 6-3, 6-7 (2), 6-2 to get halfway to a calendar-year Grand Slam. The two weeks were a struggle for Williams, who was dealing with an illness and four times rallied to win after dropping the opening set of a match.
Key Statistic I: 21 – Consecutive Grand Slam matches won by Djokovic, including titles at Wimbledon and the U.S. Open in 2015, and the Australian Open in 2016.
Key Statistic II: 70-2 - Rafael Nadal's career record at Roland Garros, where he has won a record nine championships. The only losses came against Djokovic in the quarterfinals last year, and against Robin Soderling in the fourth round in 2009.
Key Statistic III: 21 - Grand Slam singles trophies earned by Williams, one shy of Steffi Graf's professional-era record.
Prize Money: Total is about 32 million euros (about $36 million), an increase of 4 million euros (about $4.5 million) from 2015, with 2 million euros (about $2.25 million) each for the men's and women's singles champions.
Other things to know about the French Open:
Serena 'drought': Much was made of Serena Williams' title in Rome last weekend being her first trophy in nine months. She does not consider that gap a big deal. ''I guess when you win all the time, if you go a couple of tournaments and don't win them, it's like you're in a drought,'' Williams said. She is the defending champion and seeded No. 1 at Roland Garros, and another title would be her 22nd at a Grand Slam tournament, equaling Steffi Graf for the most in the Open era, which started in 1968.
Security stepped up: From patdowns at entrance gates to a 25 percent rise in the number of security agents, there is an obvious increase in protective measures at the tournament, about six months after terrorist attacks around the French capital. ''I notice more security pretty much everywhere,'' No. 2-seeded Agnieszka Radwanska said.
Olympic push: A Grand Slam tournament is a Grand Slam tournament, so there is plenty at stake as always over the next 15 days, but there is an added incentive for some players: the Rio de Janeiro Olympics. The ATP and WTA rankings of June 6 - the day after the men's final in Paris - will be the basis for Summer Games qualification.
Doping talk: Two recent events put the topic of performance-enhancing drugs on the table in tennis. Maria Sharapova's positive test for meldonium and provisional suspension are keeping her out of the field at a tournament she won in 2012 and 2014. And Nadal filed a defamation lawsuit in Paris last month against France's former minister for health and sport, Roselyne Bachelot, after she said on a television show the player's seven-month injury absence in 2012 probably was due to a positive drug test.
Cheating: A report about whether tennis was doing enough to investigate possible corruption stirred things up at the start of the Australian Open in January. While the chatter has mostly subsided, the French Open revoked the wild-card entry granted to a French player, Constant Lestienne, because the Tennis Integrity Unit said he violated a rule.
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