The stakes are high for Lazio and Inter Milan before their confrontation at San Siro.
Two straight wins have lifted the Champions League Lazio-hunting in the fourth, just three points behind third place with five games left to play for Inter.
The top four teams in Serie A qualify for European competition for elite clubs.
"The Milan game is crucial for us," said Lazio coach Edy Reja.
"This is a face to face for the Champions League qualifying. We have to beat Inter tomorrow."
Reja has recovered from midfielder Christian Brocchi, who missed last weekend's 4-1 win at Catania, an injury.
However, defender Stefan Radu is for the rest of the season with a back problem and midfielder Francelino Matuzalem is suspended.
title hopes Inter disappeared this month after two defeats in their last three league games, including last. weekend's 2-0 defeat at Parma, and they can not afford to lose more points Udinese with just four points behind them in fifth place.
They walked eight points behind leaders AC Milan.
The Nerazzurri beat Roma 1-0 in the first inning Tuesday in the semifinals of the Coppa Italia at the Stadio Olimpico.
"It was important to stop running negative results and we did in Rome," Leonardo said Inter coach.
"It was not easy, especially when our Champions League elimination.
"But we showed against Roma and maturity that have had an important result, which is not easy to do in Rome.
"Now we must continue to win.
"We have five league matches and the Italian Cup and we must remain calm and lucidity."
Inter welcome Samuel Eto'o, who has recovered from an ankle injury.