Uruguayan midfielder Guillermo Giacomazzi scored in the 40th minute for Lecce and Inter had two goals called back for offside.
Lazio won 3-0 at Chievo Verona with a first-half goal from Brazilian playmaker Hernanes and two strikes in the final minutes from veteran Germany striker Miroslav Klose.
Juventus, which edged Udinese 2-1 Saturday, leads Serie A with 44 points. AC Milan, which was hosting Cagliari later, is next with 40, followed by Udinese (38), Lazio (36) and Inter (35).
Elsewhere, Roma drew 1-1 at home with Bologna to stay sixth. Roma's 21-year-old midfielder Miralem Pjanic equalized with a splendid free kick in the 62nd minute after Bologna captain Marco Di Vaio had scored six minutes earlier.
Also, Genoa beat Napoli 3-2 with two goals from Rodrigo Palacio and one from newly signed Alberto Gilardino to get some revenge for a 6-1 loss to Napoli last month that cost Alberto Malesani his job.
In Sicily, Palermo beat last-place Novara 2-0, with Fabrizio Miccoli setting up two headers from Igor Budan; and Atalanta hung on with 10 men for a 1-0 win at Cesena following an own goal from Marco Rossi.
Earlier, Fiorentina moved into the top half of the table with a 2-1 win over Siena in a Tuscan derby.
Stevan Jovetic put Fiorentina in front with a low shot four minutes in and Cesare Natali doubled the lead with a header in the 63rd before Emanuele Calaio pulled one back for Siena with a penalty in the 88th.
Making his debut after transferring from Juventus, Brazilian-born Italy forward Amauri had several chances for Fiorentina but couldn't find the target in his first action since the end of last season.
