The Reds found themselves 3-0 to the good at half-time at the Ramon Sanchez Pizjuan on Tuesday, with a Roberto Firmino brace and a further strike from Sadio Mane having seemingly put them on course for a victory that would have sent through to the Champions League last 16 as group winners.
However, Wissam Ben Yedder's quickfire double after the break and an injury time equaliser from Guido Pizarro earned the Spaniards a share of the spoils from a topsy turvy game, meaning Jürgen Klopp's side will have to wait until matchday six to secure passage to the knockout stages.