The draw means second-placed Atletico Madrid could close the 12-point gap with Barcelona, who are on 74 points, if they beat Celta Vigo later on Saturday.
Images from the soccer matches played across Europe on Saturday.
Barcelona coach Ronald Koeman has defended centre-back Gerard Pique's right to make comments about referees favouring Real Madrid.
Manchester City cannot afford another defeat on Tuesday at home to Barcelona, who thumped them 4-0 two weeks ago, having taken just one point from their last two Champions League Group C matches.
It was the third game in a row in which Real had broken the deadlock thanks to a penalty and they sealed the win when Benzema turned provider and allowed Marco Asensio to tap into an empty net early in the second half.
Lionel Messi was at the top of his game as Barcelona earned a 3-2 win at Athletic Bilbao on Wednesday to move up to third in La Liga.
Ivan Rakitic outshone Barcelona team mate Arda Turan as Croatia ran out 1-0 winners against Turkey at Euro 2016 on Sunday, a victory that was more comfortable than the scoreline suggests.
Alexander-Arnold, seeing the Spanish club's defenders still getting organised, feigned to walk away from the corner before racing back to whip the ball to the unmarked Divock Origi, who clipped it past Marc-Andre ter Stegen.
Barcelona must to wait to confirm a place in the Champions League last 16 after dropping points for the first time in Group D in an absorbing 0-0 draw at Olympiakos Piraeus on Tuesday.
News of all that's transpired on and off the football field