A late goal by Man United's Carlos Tevez cancelled out a brilliant opener by Karim Benzema for a 1-1 Champions League draw in Lyon.
Arsenal drew nil-nil, with the reigning champions AC Milan, from Italy, with Emmanuel Adebayor missing a glorious late chance.
And Barcelona showed their class to end Celtic's strong home European record with a deserved win 3-2 in Glasgow.
Jan Vennegoor put Celtic in front in 15 minutes only for Lionel Messi to score.
Barry Robson burst forward to loop a header over Victor Valdes to give battling Celtic an interval lead.
But then Barca levelled through Thierry Henry, before dominating the second half, and Messi tucked in a 79th minute winner.
There are 16 teams left in the competition, and this was the first of a two-leg tie.