#1 Less than impressive performances
In the most recent defeat to West Bromwich Albion, Sanchez failed to show the creative side of him. He had little impact on the game and lost possession far too easily.
While playing against Crystal Palace, the Chilean lost the ball 19 times in the first 45 minutes. That is unacceptable for a player with such a huge price tag to his name. Sanchez was brought into the team to strengthen the attack, but it seems like he has not adapted well to Mourinho's style of play.
The former Arsenal man surely would have been hoping for a bright start to his career with Manchester United, but right now, it looks far from that.
The January signing could soon be dropped to the bench after Mourinho spoke of dropping players in the upcoming FA Cup semifinals against Tottenham Hotspur.