A sign that reads "embarrassing s***bags" and "get out of our club" was reportedly left outside Manchester United's Carrington training ground on Monday morning.
It's believed the sign was directed at United's struggling squad, who suffered a 1-0 defeat to relegation candidates Everton on Saturday afternoon. The result leaves Ralf Rangnick's side seventh in the Premier League - six points behind Tottenham in fourth.
Saturday's game was overshadowed by the actions of Cristiano Ronaldo, who was filmed smashing a phone out of a fan's hand at full-time. The Everton supporter has since been named as Jake Harding, a 14-year-old boy who has autism and dyspraxia.