Novak Djokovic breezes through and will face Del Potro

IT WAS child's play again for Novak Djokovic on kid's day at the French Open as the dominant Serb booked a third round slot when Romanian Victor Hanescu retired injured while trailing 6-4, 6-1, 2-3.

The 24-year-old took his winning streak from the start of the year to 39, but things could be about to get a little more serious for the world No 2 who faces 2009 US Open champion Juan Martin del Potro next.

Third seed Roger Federer and last year's women's runner-up Samantha Stosur also found it easy on a hot and sunny day at Roland Garros with wins over France's Maxime Teixeira and Romanian Simona Halep respectively.

Del Potro, whose injury problems seem to be behind him, moved menacingly through with a straight sets victory over Slovenia's Blaz Kavcic. Dressed in black, a stark contrast to the white linen dresses and shirts dappling the sunlit stands on court Phillipe Chatrier, Djokovic clinically took Hanescu apart.

The Serb breezed to victory after breaking serve in the tenth game to clinch the opening set. A series of sometimes gravity-defying shots put him two sets up with barely an hour on the clock and Hanescu, who reached the Nice Open final earlier this month, unexpectedly threw in the towel midway through the third set after massaging his left leg. "It's bad luck for him," a relaxed Djokovic, whose total winning run now stands at 41 when including last year's Davis Cup final, said at courtside. "But it's important to spend less time on court in the early rounds."

Federer showed he is still a huge threat as he sauntered into the third round by thrashing wildcard Teixeira 6-3, 6-0, 6-2 in an 84-minute morning workout as dozens of panamas bloomed in the Court Suzanne Lenglen stands.

World No 1 Caroline Wozniacki also reached the third round, but was given some anxious moments by Canada's Aleksandra Wozniak. Dane Wozniacki, who has yet to claim a Grand Slam title, survived the test with some powerful forehands and won 6-3, 7-6.