It's been a tough start to life at Manchester United for David Moyes.

A string of poor performances from United have led to people doubting Moyes' credentials. Underwhelming performances against Chelsea, Liverpool and Shakhtar Donetsk have left many United fans frustrated, while recent results against West Brom and Southampton have left many questioning the aura that surrounds Old Trafford.

Although there has been a recent upturn in results and performances, many are still questioning Moyes and United's title challenge. They currently lie in eighth place in the Premier League: eight points behind leaders Arsenal and five points behind rivals Chelsea, with two points separating the Manchester clubs.

Although Manchester United have had an extremely difficult fixture list for the start of the season, facing Liverpool away and Chelsea and Manchester City at home, they need to improve their form if they are to challenge for the title.

Whilst recent performances against Fulham and Norwich are cause for optimism at Old Trafford, a test against in-form Arsenal will truly confirm whether the recent results have been a mere blip or if Moyes has indeed found his feet in Manchester.

If Manchester United are to defend their Premier League crown, they surely have to beat the League Leaders in order to re-establish Old Trafford as a fortress.

Meanwhile, Arsenal have had a fantastic start to the season, gaining 25 points out of 30 and sit five points above second placed Chelsea. The signing of Mesut Ozil, along with the sensational form of Aaron Ramsey, has invigorated Arsenal.

However, unlike United, Arsenal have had a relatively easy fixture list until now, and as they have not yet faced ‘the Big Three’ (Chelsea, Manchester City and Manchester United), many still do not consider them as title contenders.

Although they were emphatic against an in-form Liverpool side last week, and extremely impressive in Europe last night, they can not be considered as title contenders yet, and so will have a point to prove against United on Sunday.

All-in-all, both sides will be desperate for a win on Sunday against one of their biggest rivals.

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