Kendall wrote in the Liverpool Echo: "We all know about the qualities that Fellaini possesses.
"But United will have the same problems Everton had - where is best to play him?
"We've seen Fellaini just behind the front player or as a holding midfielder.
"But when you sign a player - and especially for such a lot of money - you sign them to play in a particular role and not because he can do a job 'there and there'.
"Fellaini was Everton's top scorer last season and there is little doubt that helped increase the fee."
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