In the Wimbledon tennis championships in London, Maria Sharapova will clash with Czech Petra Kvitova today in the Women's singles final.In the Men's Singles final on Sunday, defending champion Rafal Nadal will play Novak Djokovic of Serbia. Rafal crushed Andy Murray of Britain 5-7, 6-2, 6-2, 6-4 in the semi-final on Friday. In the other semi-final Novak Djokovic beat Jo-Wilfried Tsonga of France to reach the final.India's Sania Mirza and her Russian partner Elena Vesnina have bowed out of the women's doubles competition.In the semi-finals, they lost to K Peschke of Czech Republic and K Srebotnik of Slovenia in straight sets 3-6, 1-6.