Giggs said: “There are a lot of massive teams in the next round but if we are still in the same form when the knockout stages are played as we are at the moment, no-one will want to play against us.
“You have to produce good football, that is how you put teams on the back foot and make them scared of you. That is what we have done this year.
“Nobody is going to relish coming to Old Trafford in the form we are showing.”
