Defending champion Novak Djokovic and six-time winner Roger Federer moved into the quarterfinals of Wimbledon on Monday. The third-seeded Federer advanced to his record 33rd straight Grand Slam quarterfinal with the 850th victory of his storied career. On the women's side, world number-one Maria Sharapova and former top-ranked star Kim Clijsters bowed out of The Championships yesterday while sixth-seeded Serena Williams was able to advance.