20-times Premier League title winners Manchester United have been the dominate driving force for decades, with a huge rate of success.

However they still need to improve upon their squad to claim England as theirs. Here are three improvements that the Red Devils may or could require in order to achieve unparelled success over and over again, season after season.

1. Defence

All the readers of this article must be  thinking why United would ever need to improve upon their defence, but in truce United's defence may be solid but their are two factors that needs to be considered. Age and consistency.

United's standout defenders are captain Nemanja Vidic, Rio Ferdinand, Jonny Evans, Chris Smalling and Phil Jones.

Vidic and Ferdinand are both on the wrong side of 30, with Vidic's injury doubts, his consistency is below average, nonetheless he is a solid defender and probably one of the best in the world. The duo have both passed their primes, but are still valuable assets to the back four.

Evans and Smalling both have injury doubts, although they are both young players with a lot of growth still in them. Evans had his best season as a United player last campaign, leading the 25-year-old to penning a contract extension until 2016.

Phil Jones is an extreme talent that David Moyes has on his hands, who can play centre-back, right-back and holding midfielder.

Sir Alex Ferguson claimed Jones could be the greatest player United has ever had in their history. Big call made by Fergie himself, but Jones wouldn't want to be thrown around the pitch, switching roles week in, week out.

Moyes picking up a defender wouldn't do any harm to the United squad and depth the position. An ideal defender will be a young, delicate figure. Someone who shows talent and promise and possess quality United need.

2. Centre Midfield

The most common problematic feature United have in their game is the centre of the midfield.

United have been linked with Cesc Fabregas all summer, but have failed to land the former Arsenal captain as he opted to remain in Spain with Barcelona.

David Moyes will need to look at a centre midfielder who is experienced, strong and creative, who is at a decent age and also shows promise.

A younger version of Michael Carrick, who had similar talents to the England international in their locker and can deliver the same way Carrick does, would be the perfect solution.

3. Wingers

Probably the most least talked about improvement for Manchester United but looking at the current wingers, excluding Danny Welbeck and Shinji Kagawa who primarily operate in differ roles, they have Ashley Young, Luis Nani, Antonio Valencia and new January signing Wilfried Zaha.

Ashley Young is a major injury doubt for David Moyes, having barely featured last campaign and ending the season with a leg injury.

Luis Nani was very disappointing last season and has reportedly stated he wants a move away from Old Trafford.

Antonio Valencia also had a disappointing campaign last season, but Alex Ferguson still kept trust in the Ecuadorian international although only netting one goal.

Wilfried Zaha has showed promised throughout pre-season and looks areally exciting prospect. Whether he is able to land down a regular first-team slot at United remains to be seen.

Adding another Winger to the category wouldn't be a bad idea for David Moyes and will add depth to the position,

The ideal winger for United would be a player who is quick and strong, who can match the physicality of the Premier League, at a good age and is confident in supplying crosses and making opportunities down the wing.

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