United 2-1 Arsenal: The game we contrived to throw away

Man United 2 (Rooney pen 59, Diaby og 64) Arsenal 1 (Arshavin 40)
(Premiership)

I missed Saturday's game as it was the last day of our club's cricket season, but having listened to it on the radio, and now watched the whole match in retrospect, I finally feel in a position to comment.