Fergie:
"It's terrible news.
"He's going to miss most, if not all, of the season because of it. It's awful luck for the lad. He's been a real warrior and true defender in the Argentinian fashion.
"The World Cup? It's difficult to say, but it's only September, so he'll have a chance. People have different spans of recovery. Some are very good, some come back quicker than others."