The Spanish outfit did well to top a group that contained Rangers, Rapid Wien and Spartak Moscow. They beat Sporting CP 2-1 on aggregate in the Round of 32 before comfortably beating Zenit St. Petersburg in the Round of 16, 5-2 on aggregate.
Javier Calleja's side have done well in attack, scoring goals when it matters.
Gerard Moreno and Pablo Fornals have been the standout performers up front for them.
They now gear up to face Valencia in the quarter-final.