The latter have emerged as dark horses for the top four, having won four out of their last five matches and maintained the second best defensive record in the whole division.
Nevertheless, Ferdinand believes United will always have a chance to win, if they are able to supply Ronaldo.
“This man here [Ronaldo]… In this competition you cannot bet against him coming up trumps,” Ferdinand added.
“He’s the king of this competition in terms of goals and deciding big games.
“With him in the team in this competition, you’re always in with a chance.”