Barcelona rallied from an early deficit to defeat Galatasaray 4-1, while Arsenal secured a comfortable 3-0 home victory over Lille in the Champions League.
Bayern Munich surrendered a two-goal lead to draw 3-3 with Norwegian side Viking after Michael Olise received a red card and Herman Haugen scored in the 90th minute.
Atletico Madrid defeated Manchester United 2-0 with goals from Pablo Barrios and Ademola Lookman, extending United's winless streak to five matches.