Chelsea have it all to do if they are to advance to the Champions League semi-finals after losing to holders Real Madrid at the Bernabeu.
Karim Benzema's tap-in - his 90th goal in the competition - gave Real boss Carlo Ancelotti the perfect start against his former club.
Real Madrid struggled to add to their lead before Ben Chilwell was shown a straight red card in the 59th minute for fouling Rodrygo as the Brazil forward threatened to go clean through on goal.
Chelsea produced a battling performance but Real scored what could be a decisive second goal when substitute Marco Asensio finished well after the visitors were caught out following a short corner.