Sania Mirza, Leander Peas and Purav Raja, with their team-mates, will begin their campaign at the Wimbledon Tennis Championships in London today.In the Women's Doubles, top seeds Sania Mirza and Swiss Martina Hingis will take on the Chinese-Kazakh team of Saisai Zheng and Zarina Diyas.In the Men's Doubles, the top seeded Indo-Canadian pair of Leander Paes and Daniel Nestor will clash with the Serbian duo of Viktor Troicki and Dusan Lajovic, while Purav Raja and his French team-mate Fabrice Martin will play Briton Jonathan Marray and Denmark's Frederik Nielsen. Rohan Bopanna and Romania's Florin Mergea have already advanced to the second round.In the Singles, top seeds Novak Djokovic and Serena Williams, Maria Sharapova, Stanislas Wawrinka and Ana Ivanovic will be seen in action in the second round today.Yesterday, while Roger Federer, Petra Kvitova, Andy Murray, Rafael Nadal, Tomas Berdych and Caroline Wozniacki progressed into Round-2, last year's finalist Eugenie Bouchard and world number three Simona Halep made a shock exit.