AC Milan completed a stunning second half turnaround as they netted twice in quick succession to turn a 2-1 deficit into a 3-2 lead.
The first came via the penalty spot as Castillejo was brought down inside the box, and Franck Kessie took on the responsibility, putting his miss against Lazio behind him to despatch with confidence.
The third goal for the Rossoneri game through a stroke of good fortune as the lively substitute Samu Castillejo whipped in a cross that Gunther turned past his own keeper.
