Dreadful start which worryingly is becoming a regular thing. Van Gaal got it wrong playing Carrick and Schweinsteiger against the more mobile Arsenal and maybe should have stuck with Valencia at RB given he did quite well against Sanchez last season. I probably wouldn't have made either of those calls before the game though so "hindsight is a wonderful thing". The switch to 4-3-3 seemed to help, and we may see that now after international break and in other big/away games. Defence an issue clearly, Blind at CB working well against the lesser sides but exposed greatly today and against other better sides.
Positive(s): Martial again playing football beyond his years despite being 3 down. Smalling maybe too. Oh and Wilson getting a game.