Reja believes victory against Milan will all be in the mind of his Lazio players.
"We will have to play with attention and show special concentration," declared Reja.
A particular threat will be that of the Ronaldinho-Ibrahimovic-Robinho trident.
"These three players can decide the game at any time. For this reason we must concentrate.
"Our esteem and confidence is growing but I still want to see intensity for 90 minutes."