Lyon admits he was surprised but not shocked to see the Warriors beat Melbourne at AAMI Park on Saturday, and said the unpredictability of Ivan Cleary's talented side makes them a force to be reckoned with.
"They have players out there who can score a try at any time,'' he said.
''(Feliti) Mateo has been great, there's Krisnan Inu, The Beast out there on the wing, so they are going to test us defensively.''
Lyon will have the unenviable task of trying to stop Vatuvei wreaking havoc on the wing, and although he knows he will be in for a difficult evening at ANZ Stadium, he is not worried about the prospect of facing the New Zealand international.
"I'll just jump in and hold on, he is that big and strong,'' he said.
"You need a couple of players to stop him, he is big, powerful and strong, but I have played against him a couple of times and know what to expect.
"But we've got Tony Williams as well and he is pretty hard to stop too.
"That is good for the crowd, they love to watch that kind of stuff.''
- AAP