The Reds manager was full of praise for his evergreen winger, who turns 34 this month.
Two goals from Cristiano Ronaldo earned a 2-0 victory - but it was Giggs' performance that really had Ferguson beaming.
"I thought Ryan Giggs was absolutely fantastic - particularly in the second half," he said.
"Ryan is 34 at the end of month but look at him today and the freshness he showed - he can go on for years yet, he's a wonderful servant."