Inter Milan rejoined Lazio in third place in Serie A on Sunday with a 2-0 win over Catania.
Antonio Cassano opened the scoring in the 28th minute at the San Siro, heading in a pass from Esteban Cambiasso. Rodrigo Palacio secured the victory with a volley in the 85th.
Inter and Lazio trail leader Juventus by four points, with second-place Napoli one point ahead in second following a 2-0 loss at Juventus on Saturday. Also Saturday, Lazio beat struggling AC Milan 3-2.
Fiorentina is fifth, 10 points back, after a 1-1 draw at Chievo Verona.
Cyril Thereau gave Chievo the lead in the 17th and Gonzalo Rodriguez tied it for Fiorentina a minute later. Fiorentina striker Luca Toni hit the post at the end of the first half. The Tuscan club is yet to win away.
Parma beat 10-man Sampdoria with two goals from Amauri. Palermo and Torino drew 0-0, and 10-man Udinese edged promoted Pescara with a 53rd-minute goal from Maicosuel.