Chile superstar Alexis Sanchez, who is the highest-paid player at Manchester United, is believed to be furious with manager Jose Mourinho.
According to The Sun, the former Arsenal winger has reached a new low at the Red Devils, whom he joined in January this year.
The attacker is believed to be incredibly annoyed with Mourinho after the Portuguese left him out of his plans for the Manchester derby last weekend, despite his recent improvement in form.
Sanchez was one of United's better performers against Bournemouth two weeks ago, and was also influential in the team's away win over Juventus in the UEFA Champions League last week Wednesday.
The 29-year-old started on the bench against City at the Etihad on Sunday, and came on with just 17 minutes to go.
It has been claimed that Sanchez made his feelings known following the Red Devils' 3-1 loss to the Citizens, and rumours about his future at United being uncertain have once again picked up.
The former FC Barcelona star has featured just 11 times for the Old Trafford club so far this season, scoring one goal and assisting a further two strikes.
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