Fabian Delph is one of four uncapped players to be called up to the England squad and his inclusion may put pressure on Jack Wilshere to perform.
The Blues were drawn with Schalke 04, Sporting Lisbon and Maribor in Group G.
The winger was unveiled as Manchester United's fourth signing of the summer on Thursday afternoon.
Here's the Arsenal under-21 side to face West Brom in the under-21 Premier League this evening, kick-off at 19:00 GMT.
Arsenal have reportedly submitted a £12m bid for Borussia Dortmund defender Sokratis Papastathopoulos - but that won't be enough to land him.
Bafetimbi Gomis has revealed he used Football Manager 2014 to help gather a better understanding of his new team.
Mario Balotelli says that he is excited to play at Anfield for the first time in a Liverpool shirt in the near future.
Marouane Fellaini is out of action for 'two or three weeks' according to Belgium manager Marc Wilmots.
Aston Villa boss Paul Lambert has backed Fabian Delph for successful England career upon news of his first senior call-up, claiming that the reward has been a long time coming.
Here are the groups for this season's Champions League draw including Arsenal, Chelsea, Liverpool and Manchester City.