NEW : ( CNN ) -- Roger Federer beats Feliciano Lopez in French Open first round . Novak Djokovic beats Arthur De Bakker to extend 2011 winning streak to five . Sixth seed Tomas Berdych crashes out to French unknown Stephane Robert . Defending champion Rafael González in action Tuesday against John Higgins .
NEW : Roger Federer beats Feliciano Lopez in French Open first round . Novak Djokovic beats Arthur De Bakker to extend 2011 winning streak to five . Sixth seed Tomas Berdych crashes out to French unknown Stephane Robert . Defending champion Rafael González in action Tuesday against John Higgins .