"We are expecting the biggest game of the year in terms of intensity," said Cotter.
"We must be prepared and ready from the kick-off and our control must be there.
"We know we have to stay focused and we have worked well as a group all week and are ready for the game.
"Leicester are a strong side and we know that they will be coming here with the intention to play some good rugby and will be looking for the win.
"We can't sit back and wait for them to come at us we have to start well.
"They were surprised when they came over here two years ago and we got the win but this time they know all about us and will be expecting a big clash."