By Martyn Herman PARIS (Reuters) - Top seed Serena Williams said her "psycho" side is under wraps after motoring into the third round of the French Open with a 6-1 6-2 defeat of French wildcard Caroline Garcia on Wednesday. The American world number one has courted controversy in the past with her on-court behavior but after a controlled and powerful demolition of the 19-year-old Garcia she gave the impression that all is calm.

Li Na, the 2011 champion, and Polish fourth seed Agnieszka Radwanska were early winners at the French Open on Monday as defending champions Rafael Nadal and Maria Sharapova waited to ignite their campaigns. Sixth seeded Chinese star Li was a 6-3, 6-4 winner over Anabel Medina Garrigues, the experienced Spaniard playing in her 38th consecutive Grand Slam event. Li, who had lost all of her three previous meetings on clay against Garrigues, goes on to face Bethanie Mattek-Sands of the United States for a place in the last 32.

Rafael Nadal and Maria Sharapova begin their Roland Garros title defences on Monday while Jo-Wilfried Tsonga carries the burden of trying to end France's 30-year wait for a home champion. Nadal, the seven-time champion and with a Paris record of 52 wins against just one loss, starts against Germany's Daniel Brands, the world number 60, who has lost all four first round matches he has contested at Roland Garros. Nadal is playing his first Grand Slam tournament since a shock second round defeat at Wimbledon last year sent him home to Manacor to rest his suspect left knee.

Maria Sharapova is hoping that her new role as a businesswoman will provide her with the inspiration to add to her haul of four Grand Slam titles. The 26-year-old Russian, the French Open defending champion, arrived early in Paris to attend the French launch of her SugarPova Candy Collection, which her official website describes as "a premium candy line that reflects the fun, fashionable, sweet side of international tennis sensation Maria Sharapova".