The Spanish side dominated the game and won thanks to goals from Samuel Eto’o and Lionel Messi.
Ferdinand said: “On the way back we were sitting there thinking ‘if only we had gone out and been the real Manchester United, it would have been different’.
“They always say you don’t want to come off the pitch with any regrets. There were regrets that night.
“This time we will give a better account of ourselves.”
