Djokovic untroubled by Benneteau to continue U.S. Open title defense
September 2, 2012 -- Updated 2107 GMT (0507 HKT)
New balls please. Djokovic reacts after his straight sets victory over Julien Benneteau of France.
- Novak Djokovic breezes into fourth round of U.S. Open
- Serbian beats Frenchman Julien Benneteau 6-3 6-2 6-2
- Andy Roddick powers on with four set win over Fabio Fognini
- David Ferrer sees off former champion Lleyton Hewitt in four sets
(CNN) -- Serbia's Novak Djokovic cruised into the fourth round of the U.S. Open Sunday as he dispatched Frenchman Julien Benneteau in straight sets.
Djokovic won 6-3 6-2 6-2 in the first match on the Arthur Ashe Stadium court -- not facing a single break point in a 97-minute victory.
He put that down to improvements he has made with his service and the work appeared to have paid off.
"I wanted to get more free points on the first serve and today it was working well," Djokovic told the official tournament website.
Jim Courier's U.S. Open tips
Can Murray win first tennis grand slam?
Rafael Nadal's injury heartache
"I know that I cannot serve more than 130 mph, though I'm working on it, so I hope to place it well."
Djokovic's first breakthrough came in the sixth game of the first set when he broke his opponent for the first time and the next two sets proved easier for the second seed.
The 25-year-old Djokovic will play Ukrainian 14th seed Alexander Dolgopolov, who dispatched Stanislas Wawrinka of Switzerland in straight sets.
Home favorite Andy Roddick, playing in his final tournament, is looming as a possible quarterfinal opponent for Djokovic.
The 20th seed scored a convincing 7-5 7-6 4-6 6-4 victory over Italy's Fabio Fognini, but he will have to get past the imposing figure of 2009 champion Juan Martin Del Potro of Argentina to reach the last eight.
Del Potro beat compatriot Leonardo Mayer in straight sets to reach the fourth round.
Spanish fourth seed David Ferrer also went through to the second week as he ended the run of former world number one Lleyton Hewitt of Australia, 7-6 4-6 6-3 6-0.
Ferrer breezed through the final two sets after the 2001 champion Hewitt leveled at a set all.
He will face either French 13th seed Richard Gasquet or U.S. collegiate champion Steve Johnson, who were playing later at Flushing Meadows.
Part of complete coverage on
May 23, 2013 -- Updated 1322 GMT (2122 HKT)
World No. 2 Maria Sharapova reflects on her chances of repeating last year's French Open success at Roland Garros.
May 21, 2013 -- Updated 0939 GMT (1739 HKT)
Nicknamed the "kissing disease," mononucleosis or glandular fever is a viral illness that is affecting tennis stars.
May 1, 2013 -- Updated 1129 GMT (1929 HKT)
She towers above him, but she can't do without him. Meet the man who has made Maria Sharapova the world's wealthiest female athlete.
April 22, 2013 -- Updated 1511 GMT (2311 HKT)
When Maria Sharapova underwent shoulder surgery five years ago, many thought her tennis career wouldn't last.
April 18, 2013 -- Updated 1258 GMT (2058 HKT)
Nine-year-old Rebecca Suarez stunned onlookers when she was pulled out of the crowd to team up with Del Potro against Nadal.
April 18, 2013 -- Updated 2115 GMT (0515 HKT)
Janko Tipsarevic is of the belief that his fellow professionals aren't doping -- or at least not on a widespread basis.
March 21, 2013 -- Updated 1429 GMT (2229 HKT)
Agnieszka and Urszula Radwanska are hoping to take their relationship to a new level by emulating tennis' most famous sisters.
March 21, 2013 -- Updated 1402 GMT (2202 HKT)
America's 18-time grand slam champion Chris Evert talks to Open Court about her career and training the next generation of players.
March 21, 2013 -- Updated 1344 GMT (2144 HKT)
CNN's Don Riddell speaks with 11-time grand slam champion Rafael Nadal during one of his comeback tournaments in Mexico.
March 21, 2013 -- Updated 1411 GMT (2211 HKT)
Germany's veteran star Tommy Haas opens up to Pat Cash about being away from family on tour, and his many injuries.
March 11, 2013 -- Updated 1150 GMT (1950 HKT)
You'd think John Isner and Nicolas Mahut would be sick of the sight of each other, but their friendship has grown since that epic match.
March 4, 2013 -- Updated 1608 GMT (0008 HKT)
Almost a decade after Andy Roddick's sole U.S. Open victory, America is still waiting for its next male grand slam winner. What's gone wrong?
February 21, 2013 -- Updated 1621 GMT (0021 HKT)
Open Court's Pat Cash meets American No. 1 John Isner, who experts claim has the potential to win a grand slam.
February 25, 2013 -- Updated 0917 GMT (1717 HKT)
CNN's Pat Cash looks at who the next U.S. grand slam champion might be.
February 21, 2013 -- Updated 1545 GMT (2345 HKT)
CNN's Patrick Snell looks at how the famous couple is helping groom the next generation of tennis stars.
February 21, 2013 -- Updated 1612 GMT (0012 HKT)
He's "Mac the Mouth" both on and off the court -- one of the most controversial and iconic players in tennis history, and he's still talking up a storm.
January 29, 2013 -- Updated 1131 GMT (1931 HKT)
Novak Djokovic and Andy Murray have transformed their careers since discovering a diet secret that is battling for mainstream acceptance.
January 28, 2013 -- Updated 1500 GMT (2300 HKT)
Novak Djokovic knew he was going to be a tennis star from an early age when growing up in war-torn Belgrade.
January 17, 2013 -- Updated 1325 GMT (2125 HKT)
Nine women, a bold proposal and a $1 bill. That was what it took for women's tennis to begin a 40-year journey of self-empowerment.
Today's five most popular stories