( CNN ) -- Maria Sharapova won the battle of French Open champions as she claimed the Stuttgart title Sunday with a straight sets win over China 's Li Na . Sharapova will be defending her title at the clay court grand slam in Paris next month , while Li took the French crown in 2011 . Sharapova , who won in Stuttgart in 2012 , reserved her best tennis of the week for the final as she brushed aside Li in just over 90 minutes on the indoor clay court surface . She had taken three sets to go through in all her three previous matches , but a 6-4 6-3 victory was reward for commanding play . `` I knew this was going to be the toughest match of the week , so I am really pleased with the way things worked out , '' Sharapova told AFP . `` She has played good tennis all week and I am really happy to have won here again . '' Li had won their previous clash in the semifinals of the Australian Open , but she was broken twice in each set as she slipped to defeat . It has proved an excellent work out for Sharapova as she builds up to the French Open defense , with hard fought wins over Lucie Safarova , Ana Ivanovic and Angelique Kerber on the way to the title match . Last year she beat 2013 Australian Open champion Victoria Azarenka in the Stuttgart final before claiming her Roland Garros triumph . `` It definitely helped last year on the way to the French Open , it 's good to bring back the same confidence on clay as last year , '' Sharapova added . As an added award for claiming her 29th WTA career title , Sharapova once again can drive away a luxury Porsche 911 Carrera , a bonus from the tournament sponsors .
Maria Sharapova successfully defends WTA Stuttgart title . She beats China 's Li Na in Sunday 's final in straight sets . The Russian is the first woman to win a Grand Slam singles title since Steffi Graf did it at Wimbledon in 1993. Winner of Stuttgart tournament also lands a Porsche sports car .