Shearer wrote in The Sun: "I think Naniâ€™s red card provided a cover for their failings in the tie.
"But Nani, someone who didnâ€™t even get on the bench in the first game, was not going to alter what happened defensively in that game.
"United simply lost their nerve and crumbled. Yet, for me, they had handled the whole tie as if they were the underdogs.
"Wayne Rooney was employed as something akin to a wingback in the Bernabeu to negate Realâ€™s attacking threat.
"Then in the return leg he was not even a starter because the manager felt Danny Welbeck would close down Xabi Alonso better.
"It all seemed to be about stopping Madrid rather than asking how they could stop United."
Is Shearer right? Or was Fergie being realistic? Give us your shout below