Newcastle United legend Alan Shearer has slammed Sunderland winger Adam Johnson for his performance in yesterday's derby.

Shearer wrote in The Sun: "You could argue Sunderland were also playing with 10 given Adam Johnson's performance. I don't remember him making a run, beating a man or getting a cross in.

"Some questioned Roberto Mancini for not playing him often enough at Manchester City. He certainly seemed to have the potential to make it with them.

"Mancini said so himself, which is why he was often hard on him when he questioned his workrate. But in the end he decided to cash in.

"This was a new start, the regular football Johnson craved.

"He has had a few niggles yes, but you have to wonder whether that potential he has will ever be fulfilled."