In Wimbledon Tennis Championships, world number one Serena Williams will begin her campaign in London today. The 6-time winner will take on Amra Sadikovic of Switzerland in the opening round. Serena is the reigning champion, and with 21 Grand Slam titles in her kitty, she is chasing Steffi Graf's record of 22 major trophies.Besides Serena, world number two and local favourite Andy Murray, Stanislas Wawrinka, Agnieszka Radwasnka, Petra Kvitova, Richard Gasquet and Tomas Berdych will be seen in action in the first round today.Yesterday, top seed Novak Djokovic, Roger Federer, Garbine Muguruza, Angelique Kerber, Kei Nishikori and Venus Williams were among those who advanced to the second round.Ana Ivanovic and Gael Monfils crashed out.