As Michael Carrick pulled out of the England squad this past Tuesday for England's friendlies against Chile & Germany, Moyes and every United fan's worst nightmare came true as it was announced he would be out of contention for up to six weeks.
Since the start of the 2013/14 season, apart from Wayne Rooney, Michael Carrick has arguably been United's most consistent performer. He has been pivotal in United's recent fine form, which has seen them go unbeaten since they lost 2-1 to West Brom at Old Trafford in September.
However, with Carrick sidelined until late December, Moyes will have to cope without his first choice centre midfielder, leaving him with only Tom Cleverley, Anderson, Marouane Fellaini & Phil Jones to choose from.
Although Jones put in a vintage performance against Arsenal, his eventual and preferred position is at the centre of defence. Cleverley is determined and energetic but will struggle to assert himself in games whilst Fellaini has struggled to hold down a starting berth in United's midfield since his terrible display against Manchester City in September.
This leaves the centre of United's midfield looking skeletal as Anderson can be considered a non-entity - his last appearance came as a 90th minute sub in the Capital One Cup win over Norwich in October. The fact that he has not started a game for Moyes since United's last defeat against West Brom in September speaks volumes about his position at the club.
As United look to continue their fine form as they head into the Christmas period, they will face stern opposition in the form of Bayer Leverkusen, Tottenham, Shakhtar Donetsk and Moyes's former team, Everton.
How Moyes handles his midfield dilemma will be another heavily publicised test he has to deal with in his short career so far as Man United manager.
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