I just popped down to my local bookies, to pick up some winnings for a change, and saw they had Utd priced up at 11/8 for this game. This is about right I reckon.
However, they are 2/1 on Betfair this morning. I think this is good value.
Arsenal are a fading force, although they've won most games at home the opposition in almost each case was poor.
Arsenal are struggling to score goals
Arsenal didn't rest key players over Xmas
Utd are very strong away from home
Utd are scoring freely
Utd haven't lost to Arsenal, apart from in the FA Cup on penalties, for a long time.
I've taken 2/1, I think Utd will win this by a couple of goals.
Caution: My tips come with a wealth warning