#1 Alexis Sanchez

Just 18 months ago, Alexis Sanchez was one of the League's most dynamic and best players. He now looks to be a complete shadow of his former self, and spends the majority of games needlessly losing the ball to opposition defenders. The only positive aspect of his transfer was that Sanchez did not cost Manchester United a transfer fee, he was swapped for Henrikh Mkhitaryan.
Due to Sanchez's expiring contract at Arsenal, the Manchester club made the Chilean the highest paid player in Premier League history, reportedly paying him £400,000 a week. The 29-year-old has failed to justify his wages, scoring just three times in 22 games, and Alexis has recently been dropped from the United starting eleven.
The former Arsenal star now looks to be in a permanent decline and if his performances do not pick up by the end of the season, United will most likely try to offload the player.