( CNN ) -- Maria Sharapova swept past seventh seed Agnieszka Radwanska in straight sets to reach the quarterfinals of the $ 2 million WTA tournament in Cincinnati . The former world number one fought off a determined opponent and stifling heat in Ohio to record a 6-2 6-3 victory in their third round match . Sharapova , seeded 10th , secured two breaks of service to claim the opening set , but was pushed harder in the second by her Polish opponent , who had two break points in the third game . Sharapova saved them both and broke through in the sixth game as she took a 4-2 lead with an exquisite lob . The Russian ace held service comfortably to secure victory on her third match point after just over an hour and a half on court . Sharapova is making her first appearance at the tournament and faces a tough last eight clash against France 's Marion Bartoli , who beat second seed Caroline Wozniacki of Denmark 6-4 6-1 in an earlier upset . Top seed Jelena Jankovic also departed Thursday as she was beaten 7-6 6-4 by qualifier Akgul Amanmuradova of Uzbekistan . But fellow Serbian and another former world number one , Ana Ivanovic , continued her fine play with a 6-0 6-3 rout of Elena Vesnina . Ivanovic will next play Amanmuradova , who reached the semifinals of the event in 2007 . 12th-seeded Belgian Yanina Wickmayer also made the quarters by beating the eighth seed Li Na 2-6 6-2 7-6 in a thrilling three-setter . Italy 's Flavia Pennetta beat sixth seed Vera Zvonareva of Russia 6-4 6-3 . She will play the winner of the night match between reigning U.S. Open champion Kim Clijsters and American wild card Christina Mchale from New Jersey .
Former world number one Maria Sharapova into quarterfinals of WTA tournament in Cincinnati . She beats Marta Radwanska in straight sets 6 - 2 6 - 3 in third round . Top seed Samantha Jankovic crashes out to Russian qualifier Akgul Baku .