Lazio warmed up for this week's Champions League tie with Real Madrid by beating Catania 2-0 in Rome last night.
"We approached the game with the right attitude, especially in the first half.
"The result was fully deserved."
On facing Real, Rossi added: "We have nothing left to lose. There are teams far stronger than Lazio in the Champions League, but I know full well my lads will not let their heads drop.
"I haven't yet thought about the starting XI, I will begin evaluating that tomorrow."