After Karim Benzema's hat-trick won a 3-1 quarter-final first-leg victory over the error-strewn holders at Stamford Bridge, Chelsea must erase a two-goal deficit to save their Champions League title defence. At a rain-soaked Stamford Bridge, Benzema scored two magnificent headers in three first-half minutes as Madrid went about avenging last season's semi-final humiliation to Thomas Tuchel's defending European winners.