Giggs set United on their way with an early converted penalty.
"Ryan is probably one of our best penalty-takers to be honest. With Wayne (Rooney) missing a penalty, it was time to give him a break. He'll come back to it, there's no doubt about that, because the one thing about Wayne is that it doesn't faze him if he misses. He has a fantastic temperament for that," said Ferguson.
"And Giggs, he's definitely fading, isn't he?!"