Manchester United fear Alexis Sanchez will flop at the club in a repeat of the Angel Di Maria fiasco, reports the Daily Mail .
Alexis cuts a sullen, solitary figure at United and often eats alone in the canteen, with several sources claiming he appears to be having second thoughts over his move to Old Trafford from Arsenal.
The Chile international earns £600,000-per-week, but United are worried he may turn out like Di Maria, who spent a single season at the club under Louis van Gaal.
