Arsenal have been united's trickiest opponents since Alex ferguson took over at Old trafford in november 1986.The london club have won 13 league fixtures against united in this period and collected 53 points,more than any other club.Arsene wenger has been charge for eight of these victories,including three at old trafford.
The history between both managers is loaded.it stretches back over a dozen years.highlights include ryan giggs tearing his shirt at villa park,wiltord winning league in manchester,ferguson marching provocatively on the pitch of highbury,martin keown making his point to nistelrooy,and an urchin from the away dressing room lobbing pizza at fergie

The last match against porto united show their strength in defence.Ferdinand and Vidic alongwith Anderson and Ronaldo makes d difference between d two side.united is d team playin in all the competition,that can take a hell lot of doing, going week in and week out and all the matches are important too.

arsenal form has been excellent lately.Put that down to getting their big players back from injury such as..fabregas,walcott,adebayor and persie.any team would miss d quality like that.
I would say that out of all four english team played in champions league united sparkled d least but they still are the team to beat.
                                                 can united defenders keep febregas,adebayor,persie and walcott at check??????united rooney and ronaldo ll weave thier magic again???????and create d history of back to back champions league?????ll be it a goalfest????