Second-seeded Andy Roddick had little trouble in his opening match, beating Serbian qualifier Grega Zemjla 6-4, 6-4 in the second round.

Three-time Washington champion Roddick, who had a first-round bye, never faced a break point against Zemlja and didn't lose a point in his last four service games.

“I accomplished what I wanted to. I wanted to get in some rallies early, get my feet under me and move the ball around the court,” Roddick said. “Basically get back to playing clean tennis. The things that don't necessarily show up on the stat sheet but win tennis matches.” Roddick, who had a first-round bye, fired only four aces but he never faced a break point against Zemlja and didn't lose a point in his last four service games. He also took advantage of his break-point opportunities, converting all four chances.

“I was in control of my own service games, which was good,” Roddick said. “I didn't dig myself many holes out there.” Roddick has a career 30-5 record in Washington, including three titles.

In the final match of the night, fifth-seeded John Isner needed two tiebreakers to defeat Thiemo de Bakker, 7-6 (6), 7-6 (8).

Isner sealed the win with three aces in the second tiebreaker. He had 15 in the match.

The last time the two met was in the second round of Wimbledon. De Bakker won that meeting, which came a round after Isner's record-breaking marathon victory against Nicolas Mahut.

Both Isner and de Bakker relied on a strong service game, with de Bakker getting nine aces of his own. De Bakker saved the only break point of the match.

Verdasco twice faced match point in the second set before coming back to beat Michael Berrer 4-6, 7-5, 7-6 (6). Fish, who is seeded 15th, beat Viktor Troicki 6-4, 6-3.

Verdasco, who entered the tournament ranked No. 10, trailed 2-5 in the second set before winning five straight games to level it at one set apiece. In the third-set tiebreaker, he briefly sat on the court in pain holding his left foot after losing the 12th point. After the Spaniard rose, he won two straight points for the victory.

Fish, meanwhile, has won his past two tournaments, in Newport and Atlanta. His last loss came in the second round at Wimbledon. He credited his recent success to a new fitness regimen which led to him losing 30 pounds since undergoing knee surgery last September.

Troicki double-faulted six times in the match, included three times in one game during the first set.

Also in the second round, fourth-seeded Marin Cilic defeated Denis Istomin 6-4, 6-2 and Xavier Malisse upset No. 12-seeded Julien Benneteau 7-5, 6-4.

In Tuesday's first-round matches, Marco Chiudinelli beat Brian Dabul 7-6 (3), 6-2; Janko Tipsarevic defeated Arnaud Clement 6-4, 6-0; Alejandro Falla won against Lu Yen-hsun, 7-5, 6-1; and Kristof Vliegen advanced when Richard Gasquet retired after dropping the first set 6-3.
 
Zvonareva makes winning return  

In San Diego, California, Wimbledon finalist Vera Zvonareva enjoyed a successful return to hardcourt action with a 6-0, 3-6, 6-4 victory over Dominika Cibulkova in the first round of the San Diego Open on Tuesday.

The third-seeded Russian was joined in the second round by occasional Fed Cup team mate Svetlana Kuznetsova, who upset eighth seed Yanina Wickmayer 6-3, 2-6, 6-1.

In other matches, fourth seed Agnieszka Radwanska of Poland overcame Chanelle Scheepers of South Africa 7-5, 6-3, while fifth seeded Italian Flavia Pennetta defeated Kateryna Bondarenko of Ukraine 6-2, 7-5.

Daniela Hantuchova caused the biggest upset of the day when the Slovakian saved two match points before edging out sixth seeded Marion Bartoli of France 3-6, 7-6, 6-4.

Hantuchova advances to face China's Zheng Jie, who waltzed past American Shenay Perry 6-3, 6-2, while seventh seed Shahar Peer continued to heap misery on former world No. 1 Ana Ivanovic, beating the slumping Serbian 7-6, 6-3.

Playing her first match since she fell to Serena Williams in the Wimbledon final last month, Zvonareva struggled to find her consistency but served much better in the third set and was able to move Cibulkova out of her comfort zone.

Zvonareva will next face American teenager Coco Vandeweghe, who advanced when Argentina's Gisela Dulko retired with an ankle injury while trailing 6-0 3-0.

Now ranked world No.  21, Kuznetsova has won only one tournament since lifting her second grand slam title at the 2009 French Open, but was able to raise her game in the third set against the erratic Wickmayer.

"It's very frustrating to be where I am," said Kuznetsova, who will play Italy's Sarah Errani. "I was always a top 10 player and now I'm somewhere else. For others it's normal, but I think I belong somewhere else." Ivanovic, the 2008 French Open champion, came into the tournament ranked number 60 and has lost six of her last nine matches.

The 21-year-old was reduced to tears in trying to explain her demise.

Peer will face Yaroslava Shvedova of Kazakhstan, who defeated Nadia Petrova of Russia 5-7 6-4 6-1.