Francisco Moura's second-half strike earned hosts Porto a 1-1 draw against 10-man AS Roma in the first leg of their Europa League knockout round play-off on Thursday.
Celtic, who won Europe's premier club competition in 1967, set up a clash with Romanians Cluj in the next stage after a 2-0 win at Nomme Kalju completed a 7-0 aggregate rout of the Estonian champions.
Sevilla in semis as Wolves miss penalty.
Chelsea manager Jose Mourinho stoked up his war of words with Manuel Pellegrini on Monday by questioning the Manchester City manager's sums.
A summary of Wednesday's matches in the UEFA Champions League.