Cole played with Ferguson at United and in his column for the Independent, he said: "The club have let him go, and even some of his players have come out saying they've let him down, but that's beside the point.
"What should count for something is the awesome job he's done for Peterborough, winning two successive promotions with them to get to the Championship, which is the most competitive division in Britain. And although the start to their season hasn't been fantastic, they are hardly adrift - they're bottom, but only by a single point. Surely he has earned some time? His departure is a disgrace."