Once-mighty Napoli travel to mid-table Bologna amid more talk of refereeing favouritism in Italian football.
The unfashionable club from Italy's south were ripped apart 3-0 by Milan five weeks ago, but have quickly picked themselves up and after three straight victories are back in second spot three points behind the Rossoneri with just seven matches of the season to go.
Last week with all eyes on the north's top-of-the-table Milan derby, Napoli beat fifth-placed Lazio 4-3 in the match of the day to move two points above fading Inter and reignite hopes of a first scudetto since 1990, led by Diego Maradona.
"It has been an incredible season," said coach Walter Mazzarri, after seeing his side come back from two goals down against Lazio.
"We defeated the demons through strength of pride and character. Bologna will be the first of seven more battles."
However, after a stirring comeback in front of 75,000 at the San Paolo stadium, Napoli's euphoria was soured by suggestions the result was influenced by bad officiating.
Lazio president Claudio Lotito told Italy's Radiouno the match "unfair," pointing to a Christian Brocchi's shot that television replays showed had crossed the goalline and, at 3-2, a dubious penalty decision and the sending off of defender Giuseppe Biava.
His counterpart Aurelio De Laurentiis, who had reportedly clashed with Lotito at a league meeting in the days ahead of the match, leapt to his side's defence.
"For me it was a clean and fair game, completely above suspicion," the film producer told Napoli's Radio Marte.
"There's always the chance of a mistake in favour of one team or the other if the rules don't change [introduction of video technology].
"If Lotito called Cavani a diver, he's out of order. There's always been some theatrics in football but Cavani is not a cheat."
