Robin Van Persie's knee knock has created a massive problem for David Moyes to deal with.
David Moyes has a dilemma over whether to start Robin Van Persie this weekend after he was carried off on a stretcher against Olympiakos.
Initially, the injury looked like a bad one but Moyes has since confirmed it was a blow to the knee and we’ll find out the extent of the problem later today when Moyes gives his pre-West Ham press conference.
It will be tempting for Moyes to throw Van Persie into the side following his performance against the Greeks in the Champions League but such is his importance, Moyes may not want to risk making any problem worse.
That should provide an opportunity for Juan Mata to move back into his more suited number ten role, over a position down either side of United’s midfield, which is where he has been playing.
Mata is perfectly capable of controlling the game at West Ham in that position, which will allow Wayne Rooney to focus on playing a striker role and not having to drop off to support United’s midfield.
The problem for Moyes is what he does if Mata produces a world class performance in the number ten position.
It would be difficult for him to then shove Mata back out on the right or left hand side of the pitch when he was so clearly effective through the heart of the team.
It’s also a decision that would confuse United fans who have been calling out for Mata to play centrally ever since he arrived at the club from Chelsea in the last transfer window.
Ultimately, Moyes is going to have to upset someone if Mata performs well in the number ten slot this weekend.
He upsets Van Persie by delaying his return to the team, he upsets Mata by moving him away from that central role again or he upsets Wayne Rooney by opting for the Dutch striker ahead of the United icon.
Considering the profile and ego of his two centre forwards, it seems most likely that he’ll upset Mata, which could cause fans to question what on earth the gaffer is playing at should he play out of his skin behind Rooney this weekend.
It’s a real problem and one Moyes has to get on top of.