Gonzalo Higuain scored again to help Napoli beat title hopeful Roma 2-0 amid high tension at the Stadio San Paolo on Saturday.
Higuain, who hadn't scored in the opening seven rounds, netted his fifth goal in six days as Napoli got off to a blistering start.
The Argentine turned provider to help Jose Callejon seal the result late on.
Callejon and Marek Hamsik also hit the crossbar in an entertaining first half for Napoli.
Roma remained level at the top of the table with Juventus, which visits newly-promoted Empoli later. Inter Milan travels to bottom club Parma.
Napoli moved provisionally third ahead of the rest of the weekend's fixtures.
It was the first time the two teams had met since a Napoli fan was shot dead in Rome before the Italian Cup final.
(For more sports news and updates, follow Ahram Online Sports on Twitter at @AO_Sports and on Facebook at AhramOnlineSports.)