( CNN ) -- Petra Kvitova will face Victoria Azarenka in the final of the WTA Championships in Istanbul on Sunday . The reigning Wimbledon champion recovered from a set down against Australia 's Samantha Stosur to eventually win 5-7 6-3 6-3 . Belarussian , Azarenka enjoyed a more comfortable 6-2 6-3 win over Russia 's Vera Zvonareva . Kvitova started brightly enough against Stosur taking a 4-2 lead in the opening set , but then a series of unforced errors let the increasingly confident Australian back into the contest . It was n't long though before the left-handed Czech soon found her rhythm grinding down the spirited Stosur with a series of forehand winners to take the second set and level the match . Kvitova then raced into a 4-0 lead in the deciding set before Stosur pulled one break back but it was too late to save the match . The 22-year-old Azarenka , meanwhile , enjoyed much the better of a series of baseline rallies with her Russian opponent , and despite her serve not being in the best order ran out an easy winner . The victor on Sunday will rise to number two in the world rankings . Kvitova will start as favourite as she has won the two previous meetings between the pair this year .
Reigning Wimbledon champion will face Belarussian in WTA Championship final . Kvitova beats Samantha Stosur in three sets in semifinal . The Czech Republic is the defending champion, having won last year's title at Queen's Club.