STUTTGART (Agencies) - Vera Zvonareva rallied to beat Anastasia Pavlyuchenkova 3-6, 6-4, 6-2 in an all-Russian match on Wednesday to reach the quarterfinals of the Porsche Grand Prix. The second-seeded Zvonareva remains on course to add to her Doha title this year after struggling past Pavlyuchenkova on the indoor clay court at Porsche Arena. Also in the second round, Agnieszka Radwanska upset French Open champion Francesca Schiavone 6-1, 6-3, Sabine Lisicki downed Australian Open runner-up Li Na 6-4, 7-5, and Kristina Barrois defeated eighth-seeded Marion Bartoli 6-4, 6-2. Barrois and Lisicki are the first Germans to reach the last eight in Stuttgart since Anke Huber 10 years ago. The third-seeded Schiavone won her first four matches against Radwanska, but has lost to the Pole both times this year. Barrois landed 81 percent of first serves against the 12th-ranked Bartoli, the highest-ranked player she has beaten. Lisicki broke to lead 6-5 in the second set and served out the match against the sixth-seeded Chinese. The German was once ranked as high as No. 22, but was out for nearly half a year with an injured left ankle and is now ranked No. 155. Women's tennis in Germany is going through a revival following a long slump that came after the retirement of Steffi Graf. Germany beat the United States 5-0 at the weekend in the same arena to seal a place in next season's Fed Cup World Group. Earlier, Germany's Andrea Petkovic sobbed during a changeover but set up a second round clash against Jelena Jankovic after battling past Austrian qualifier Tamira Paszek 3-6 6-2 6-2. Serbia's former world number one Jankovic found no resistance from Spaniard Beatriz Garcia Vidagany, easing through in the clay court tournament with a 6-1 6-2 victory. Paszek, 20 and ranked 88th, showed no signs of nerves, punishing local favourite Petkovic with a series of bludgeoning forehands to claim the first set with her stunned opponent double-faulting on set point and then sobbing. Petkovic, the world number 19 who was a quarter-finalist at Januarys Australian Open, took the initiative early in the second set with more aggressive play but Paszek looked to have found a way back into the match taking a 2-0 lead in the third. She said: "I felt the crowd giving me a boost because maybe I was a bit too comfortable after the weekend win)."