Fernando Torres and Steven Gerrard are both in excellent form and have built up a fantastic partnership that will see the Reds go to Old Trafford on Sunday full of confidence.
"Gerrard and Torres have a partnership like I've never seen before. The two of them are in unbelievable form at the moment, both looking strong and both scoring goals," said Riise.
"I wouldn't say I'm surprised with the way Torres is playing because we knew he was a top striker, but sometimes it can take a while to settle in English football. He hasn't needed time at all. I know for a fact that defenders hate to play against him because he's so quick and so strong.
"United will definitely be worried about us because we're the form side at the moment, but at the same time we have to respect them because they are a top side also."
