Mathieu Flamini, who has also had spells at Marseille and AC Milan, made 246 appearances over two spells at Arsenal
Goals from Olivier Giroud, Aaron Ramsey and substitute Mathieu Flamini ensured Arsene Wenger's side will travel to Monaco brimming with confidence.
Flamini made 153 appearances for Arsenal between 2004 and 2008 before leaving for Milan, where he spent five seasons.
Inter Milan's hopes of playing any kind of European football next season were derailed by a 3-1 defeat at home to Lazio, a win which left Inter in eighth place but moved Lazio up to sixth and within site of the Europa League.
AC Milan have confirmed Mathieu Flamini will remain with the Serie A club for another season.
AC Milan defender Alessandro Nesta will be out for at least a month after picking up a thigh injury in Wednesday's Champions League loss to Barcelona.
AC Milan's French midfielder Mathieu Flamini will be out of action for the next five months because of a knee injury, the Italian Serie A side announced on Friday.
AC Milan moved within one point of winning the Serie A title with a 1-0 victory over Bologna on Sunday.
Tottenham manager Harry Redknapp blasted former Arsenal midfielder Mathieu Flamini over a horror studs up, two-footed lunge that he said could have broken Vedran Corluka's leg.
French midfielder Mathieu Flamini has signed a contract to join AC Milan from English side Arsenal at the end of the season.