Defending champion Francesca Schiavone advanced to the quarterfinals at the 2011 French Open on Sunday, but third- seeded Vera Zvonareva tumbled out of the tournament.

The fifth-seeded Schiavone committed 44 unforced errors, but still got past 10th-seeded Jelena Jankovic, 6-3, 2-6, 6-4. Both players had not dropped a set prior to Sunday's match -- their first meeting in two years.

Schiavone is still aiming for her second Grand Slam title, while Jankovic will go another tournament without one. The Serbian former world No. 1 was a semifinalist three times at Roland Garros, but has not done better than a runner-up finish at the U.S. Open in 2008.

The field was wide open after the top two seeds were given early exits. Top- ranked Caroline Wozniacki lost to Daniela Hantuchova in the third round, while second-seeded Kim Clijsters was beaten by 20-year-old Dutchwoman Arantxa Rus in the second round.

On Sunday, the next highest-seeded player fell, as 14th-seeded Anastasia Pavlyuchenkova claimed a 7-6 (7-4), 2-6, 6-2 win against Zvonareva, a fellow Russian.

Zvonareva is also still looking for her first major title, and came close twice last year, reaching the final at Wimbledon and the U.S. Open. But she has never had much success at Roland Garros, with a career-best finish in 2003, when she reached the quarterfinals. Zvonareva was bounced in the second round last year.

Pavlyuchenkova, meanwhile, broke through to the quarterfinals for the first time in her career. The 19-year-old had advanced to the third round in 2009 and '10.

She will face Schiavone in the next round.