Jack, Chesney and Bellerin only derserve above average marks for this game.
Kos and Merts have truly lost it. They were terrible. Gibbs was pretty pointless as well. Our defence weren't helped by probably the most shocking defensive midfield performance I've seen since Denilson held down a first team spot. Arteta was awful. Shunned responsibilty, hid from the ball when our defenders needed to dish off a pass, offered them no protection.
Same goes for Aaron Ramsey. He's fucking lost it. We played a lot better once he was off for Cazorla and Jack stayed deeper. Ozil...another meh performance. A passenger. Sanchez had a shit game. Works his socks off but needs to learn how to pass. Danny Welbeck....Welshit! On that performance, he's no better than Sanogo. 4 chances fell to him and he didn't hit the target and work the keeper once.
Wenger has to take these guys back to basics ASAP. They let Dortmund pass freely and didn't put any pressure on them or attempt to win the ball. It was the same against City when try had long spells of possession.