Arsenal lost their Champions League Group D opener 2-0 against German powerhouses Borussia Dortmund in a very one-sided match.
Dortmund's opener came from the last kick of the first-half, as striker Ciro Immobile picked up the ball from the halfway line and the Italian ran all the way to the visitors penalty box, unchallenged, slotting the ball past Wojciech Szczesny with a low finish to give the hosts the lead.
The second goal came in the 48th minute when Gabon forward Pierre-Emerick Aubameyang rounded the Arsenal keeper to place the ball into the net to make it 2-0 to the German giants.
Danny Welbeck wasted Arsenal's best chance of the first half after the Englishman was played through by Aaron Ramsey, but the striker fired the ball wide of Roman Weidenfeller.
The Gunners came into the game without right-back Mathieu Debuchy who picked up an ankle injury during Arsenal's 2-2 draw with Premier League champions Manchester City, ruling the French international out for three months. Calum Chambers was only fit enough to start on the bench, meaning that 19-year-old Hector Bellerin made his full first team debut for the north London side.
Henrikh Mkhitaryan let the north London side off on a handful of times throughout the match with some sloppy finishing and Aubameyang hit the crossbar in the second half, as Dortmund dominated the clash.
Wenger must now take a hard look at his side after a uninspiring performance tonight. Once again Mesut Özil looked as if he wasn't even playing on the left-wing, which has baffled Arsenal fans and pundits alike, whilst Aaron Ramsey and Arsenal captain Mikel Arteta looked non-existent in the midfield.