体坛英语资讯：Djokovic and Dementieva stunned, Federer and Serena fight through_娱乐

体坛英语资讯：Djokovic and Dementieva stunned, Federer and Serena fight through

Big names underwent a tough Saturday at the French Open as fourth seeds Novak Djokovic and Elena Dementieva both bowed out and Roger Federer and Serena Williams rallied from a set down to advance into the fourth round. Djokovic's dream of capturing the French Open title evaporated after German 29th seed Philipp Kohlschreiber swept the Serbian aside 6-4, 6-4 and 6-4 in two hours 21 minutes while unfancied Samantha Stosur avenged her 2009 Australian Open loss to women's fourth seed Dementieva in a 6-3, 4-6, 6-1 victory, entering the second week at Roland Garros for the first time.

体坛英语资讯：Djokovic and Dementieva stunned, Federer and Serena fight through1

Germany's Philipp Kohlschreiber returns the ball against Serbia's Novak Djokovic during the 3rd round competition of men's singles at the French Open tennis tournament at Roland Garros in Paris, France, May 30, 2009. Kohlschreiber won the match 6-4, 6-4, 6-4.

Federer, bidding for the only Grand Slam title which has eluded him, survived an early niggle before bearing down in windy conditions to dispatch home player Paul-Henri Mathieu 4-6, 6-1, 6-4, 6-4. 体坛英语资讯：Djokovic and Dementieva stunned, Federer and Serena fight through2

Switzerland's Roger Federer plays a forehand against French player Paul-Henri Mathieu during the 3rd round competition of men's singles at the French Open tennis tournament at Roland Garros in Paris, France, May 30, 2009. Federer won the match 4-6, 6-1, 6-4, 6-4.

Serena was also made sweat as the U.S. and Australian Open champion conquered Maria Jose Martinez Sanchez of Spain 4-6, 6-3, 6-4. Djokovic, strangely out of sorts, struggled to find his timing all match long, hitting 38 unforced errors and a whole bunch more that were forced upon him by Kohlschreiber's incessant long hitting, both down the line and cross court.