Giggs feels City can't take the heat ahead of tomorrow' derby.
"With City winning the league last season, it has added spice.
"I think teams raise themselves against us, because we are United, and City have found that a bit this season, because they are the champions and because of the money they've spent.
"With all the exposure and quality of players they've got, everyone wants to beat them. It's tough when you are champions and have got to try and defend it."