Speaking to Gambling Zone, the ex-France international said: "The problem for Ruben right now is that he looks like he’s struggling for the solution on the bench. He looks like he’s trying to figure things out for the first time, trying to make them play better somehow. He looks lost. I don’t think his body language and manner, his emotional response, gives a great impression to his players and the fans of Manchester United. Looking at him, I don’t know if he will make it to Christmas, to be honest, because it feels like United are one defeat or one bad performance away from a crisis."