The third and penultimate Grand Slam of the season, the Wimbledon Tennis Championships begin in London this evening. Defending champion and world number one Novak Djokovic will open play at the Centre Court against Germany's Philipp Kohlschreiber. Women's world number one Serena Williams will also be seen in action in the opening round today against Russian Margarita Gasparyan.Besides, Stanislas Wawrinka, Maria Sharapova, Kei Nishikori and Ana Ivanovic will also feature today in the first round.Earlier, David Ferrer had pulled out of the competition with an elbow injury.In the Doubles, Rohan Bopanna will begin India's campaign in this oldest and the most prestigious tennis tournament. He and his Romanian teammate Florin Mergea will take on the Czech-American team of Jiri Vesely and Tim Smyczek today.