( CNN ) -- Former world No . 2 Petra Kvitova secured her first WTA Tour title of 2012 by defeating former French Open champion Li Na in Monday 's final of the Rogers Cup . Key to the Czech Republic 's 7-5 2-6 6-3 victory was her decisive break of serve in the final set to condemn her Chinese opponent to a third final loss of the year -- following Li 's reverses in Sydney and Rome . It was Kvitova 's first appearance in a final this season and the win meant she won a Tour event for the first time since the season-ending championships in Istanbul last October . `` The first set was a really big fight -- every game was very close , '' world No . 5 Kvitova told the WTA Tour 's official website . `` Maybe I was a little bit lucky to win the first set . She played very well in the second set . She was very aggressive without any mistakes . '' Kvitova 's triumph in Montreal was all the more impressive considering the 22-year-old suffers from asthma , which usually adversely affects her performances in North America due to the summer humidity . `` I have asthma so I have trouble breathing sometimes , but it was n't too humid here this week , '' she explained after reaching her first final on the continent . `` It 's only a problem in North America , unfortunately , because here it 's more humid than Europe or Australia , where it 's very hot but not that humid . Humidity is the main problem for me . `` But it 's great to know I can play well here and it 's great I finally won a title this year . I 'm so glad it could be here at the Rogers Cup in Montreal . '' Desite the loss , Li showed glimpses of the form which made her China 's first grand slam singles champion at Roland Garros last year . At the start of the second set Li , who has returned to the top 10 of the world rankings of the back of her performances in Canada , won 16 points in a row . `` I really have to say she played very well today . I think we both played a very good match , '' Li said of her opponent . `` I 'm very happy because this was the first hard-court tournament after the Olympics , and my new coach is going to come to Cincinnati , so I think this is a very good start to this season for me . '' Li recently started working with Justine Henin 's former coach Carlos Rodriguez .
Petra Kvitova beats Li Na to win Olympics in Montreal . The win in Montreal secures Kvitova her second Tour title of 2012 . Reaching the final guarantees Montreal 's Li Na a return to the top 10 of the world rankings . Li has now lost three finals in 2012 , having also suffered defeats in China and Rome .