The year's third Grand Slam Tennis event, Wimbledon Tennis Tournament, began in London today. As per the results available with us, Kim Clijsters and Nadia Petrova have advanced to the second round in the Women's singles.India's Sania Mirza will be facing world number 55 Angelique Kerber of Germany. Only twice has Sania reached the third round of a Grand Slam in her last 14 appearances.