NEW YORK, Sept. 2 (Xinhua) -- Andy Roddick, seeded 21, proved still a worthy veteran and too much for the rising American Jack Sock in the second round of U.S. Open clash happening between two fellow Nebraskan on Friday night.
The 29-year-old Roddick, the declining former U.S. number one, defeated the 18-year-old Sock in straight sets of 6-3, 6-3, 6-4.
Sock, who just won his first career Grand Slam match beating Marc Gicquel on Wednesday, earned a wild card into the U.S. Open each of the last two years by winning the boys' national championship.
Against Roddick, he showed off some of the skills that make some think he could be the country's next star tennis player.
Sock showed off his skill in attacking by hitting 10 of the match's first 11 winners, but in key points grasp he is far below the 2003 champion.
Sock made just one out of seven break points, while Roddick converted five out of five.
"I wouldn't say we're really good friends," Sock said. "I say hi, talk a little bit. It helps that, I mean, we're both from Nebraska. I met him when I was really young at a Husker football game. I've met him here and there since. Spent a little time with him, practiced with him a couple times. But other than that, we're just pretty much friends."
Roddick's ranking dropped out of the top 20 this season for the first time in a decade.
In earlier matches, Rafael Nadal breezed into the third round as the defending champion was two sets to the good when Nicolas Mahut retired.
Andy Murray, fourth seed, overcame a two-set deficit to defeat Robin Haase and advance to the third round with a 6-7 (5), 2-6, 6-2, 6-0, 6-4 victory.
Murray has been in the semifinals of the year's first three majors but is still in search of his first Grand Slam title.
His next match is against No. 25 Feliciano Lopez of Spain, who beat Canadian Vasek Pospisil 5-7, 6-4, 7-6 (3), 7-6 (5).
Former champion Juan Martin Del Potro backed up his impressive first-round win over Filippo Volandri with a mauling of fellow Argentine Diego Jungueira.
Fifth seeded David Ferrer easily cruised past American veteran James Blake to a 6-4, 6-3, 6-4 victory.
John Isner, No. 28 seed, won the battle of the Americans, blasting down 20 aces in his 6-4, 6-3, 6-4 win over Robby Ginepri.
Donald Young gave the home fans surprising cheers as the American battled relentlessly to beat Stanislas Wawrinka, seeded 14, in five sets. Young won both tiebreakers in an epic victory of 7-6 (7) 3-6 2-6 6-3 7-6 (1).
12th seeded Gilles Simon of France defeated Guillermo Garcia-Lopez of Spain 6-4, 6-7 (4), 7-5, 6-3.
Julien Benneteau from France swept past Denis Istomin of Uzbekistan in straight sets of 6-4, 6-4, 6-4.
David Nalbandian of Argentina outclassed 30th seeded Ivan Ljubicic of Croatia 6-4, 1-6, 6-3, 6-2.
Another Argentinean, 24th seeded Juan Ignacio Chela powered off Steve Darcis of Belgium 6-2, 6-4, 6-4.
Russia's Igor Kunitsyn fought through five sets to win over 17th seeded Austrian Jurgen Melzer 3-6, 6-3, 1-6, 6-2, 7-6 (5).
Gilles Muller of Luxemburg beat Ernests Gulbis from Latvia, 3-6, 7-6 (4), 6-4, 7-6 (5).
