Jamie Carragher believes that Robin Van Persie has not looked right for the past 12 months in a Manchester United shirt.
The striker has put in a number of off-colour displays more recently and Carragher feels that it has been a sustained problem.
Van Persie has only scored twice so far this season and the Sky Sports pundit feels that he has been below his best for some time.
The Dutchman's performance last night against West Bromwich Albion has caused even more scrutiny on his form.
Van Persie was virtually anonymous leading the line in the 2-2 draw, with his movement lacking and his finishing prowess not on display.
There are concerns that the 31-year-old is showing signs of his age and he will be under pressure to perform soon.
United have a wealth of attacking options, meaning that every offensive-option available to Louis Van Gaal needs to maintain high standards to remain in the team.
The likes of Falcao and Wayne Rooney provide competition for Van Persie in the striking positions in one of the most intimidating front-lines in European football.
United's problems have so far been focused on their defensive issues this season, but Van Persie's poor performances are beginning to get criticised and he needs to find his very best soon.
The Red Devils take on Chelsea this weekend and the predatory front-man will need to show all his class if he is to hit the back of the net against the Blues.