Arsenal produced a five star performance in Portugal on Tuesday to get their European Champions League campaign firmly back on track.
The Gunners brushed aside the Portugese champions 5-1 at the Estadio Jose Alvalade.
Arsenal had five difference scorers on the night.
In other games, Manchester City extended their winless run to seven games as they were held 3-3 at home by Dutch side Feyenoord.
Kim Min-Jae scored in the 38th minutes for Bayern Munich to beat Paris St. Germaine 1-0 in Munich. Robert Lewandowski scored twice and Danny Olmo the other as Barcelona stopped Brest of France 3-0.
AC Milan outscored Slovan Bratislava 3-2 and Atletico Madrid crushed Sparta Prague and Inter Milan turned back RB Leipzig.