WIMBLEDON, England -- Pursuing another bid for her first Grand Slam title, top-ranked Caroline Wozniacki made only one unforced error in defeating Virginie Razzano 6-1, 6-3 on Friday to move into the third round of Wimbledon.
While Wozniacki was at the top of her game, Pironkova turned the tables on Court 2. The 32nd-seeded Bulgarian broke Zvonareva four times and saved six of seven break points.
It was Zvonareva's earliest loss in a Grand Slam since last year's French Open.
The match was a repeat of the 2010 Wimbledon semifinals, which Zvonareva won in three sets to reach the first of her two Grand Slam finals last year.
Pironkova knocked out Venus Williams last year. She could face the five-time champion again in the fourth round.
Williams cruised to her 71st career Wimbledon win with a 6-0, 6-2 victory over Maria Jose Martinez Sanchez.
Only Martina Navratilova (120), Chris Evert (96) and Steffi Graf (74) have more wins at Wimbledon than Williams.
Williams won the Wimbledon title in 2008, but she lost to sister Serena in the 2009 final.
"Last year, I wasn't on my best game," Venus Williams said. "But this year, I'm really going to look forward to really playing a little bit better than last year. Every now and then we all have bad days, but I'm planning to have a better one this year."
Williams had 21 winners and only five unforced errors against Martinez Sanchez. It was a big change from her previous match, when Williams was stretched to three sets and three hours by 40-year-old Kimiko Date-Krumm.
"The other match was three hours of nonstop running, so it felt like a marathon," she said. "I'm feeling good and it's great to be ready for the second week. I'll get a couple of days off to really get things in order."
Maria Sharapova, looking for her fourth Grand Slam title, had to hold on to beat British wild card Laura Robson 7-6 (4), 6-3. The 2004 champion at the All England Club trailed 4-1 in the first set, and then 4-2 in the tiebreaker, before rallying for the win against the 17-year-old Robson.
"There will be many tournaments and many losses and many wins," Sharapova said of Robson. "I think it will just be important to learn from the situations. And, yeah, obviously it's great and it's important to play in front of thousands of people with the support of the British crowd."
Sharapova next plays Klara Zakopalova.
"I felt like I started off really slow and she started off really well," said Sharapova, who was booed when she challenged a winner by Robson. "Quite the opposite of me, I think she was much more aggressive than I was in the beginning."
Wozniacki beat Razzano in 66 minutes in sunny conditions on Court 2 at the All England Club.
The 20-year-old Dane, who extended her career record against the 96th-ranked Frenchwoman to 5-0, took command of the match from the beginning and was never in trouble.
Razzano saved three match points at 5-2 down in the second set and another in the next game before Wozniacki hit a service winner into the corner to close the match.
"I served pretty well today and ... dictated quite a few of the points," she said. "I was happy about the game."
Wozniacki, who will face Jarmila Gajdosova, reached the fourth round at Wimbledon the past two years but has never made it to the quarterfinals.
Despite her No. 1 ranking, she has never won a major title, losing at the 2009 U.S. Open to Kim Clijsters in her only Grand Slam final.
Wozniacki leads the tour this year with five titles, but lost in the third round at the French Open to extend her drought at the majors. She is guaranteed to hold onto the No. 1 ranking at least until August.
"I think I deserve to be where I am," Wozniacki said. "I won so many tournaments already, five this year. I'm playing good tennis. I'm young. I'm competitive. My time will come."
Wozniacki was asked about being put on Court 2, rather than Centre Court or Court 1. On Thursday, five-time champion Serena Williams was asked why she and sister Venus, a five-time champion, had been scheduled on Court 2 while the top men had played only on the two main courts. The Williams sisters have combined to win nine of the last 11 Wimbledon titles.
"Obviously, I think I deserve to play on one of the bigger courts," Wozniacki said. "It's up to the tournament to decide where we're going to play. I just go out there and I try to win. ... If (Serena) can play on Court 2, then I guess I can, too."
The 28-year-old Razzano, playing in her 10th Wimbledon, had 20 winners, seven more than Wozniacki, but also 14 unforced errors.
It was her second Grand Slam tournament since the death in May of her former coach and
fiancé Stephane Vidal, from a brain tumor.
"It's unfortunate what's happened to Virginie," Wozniacki said. "The only thing we can do is go and support her and ask if she needs anything. On the court you want to fight and win, but off the court everyone's human."
Elsewhere Friday, 2007 runner-up and No. 9-seeded Marion Bartoli beat Lourdes Dominguez Lino 4-6, 7-5, 6-2 to reach the third round. No. 11 Andrea Petkovic was ousted by Russia's Ksenia Pervak, 6-4, 7-6 (2).
Information from The Associated Press was used in this report.