Elsewhere in Italy, a Victor Ibarbo hat-trick inspired Cagliari to a big win over in-form Sampdoria, while Udinese and Roma played out a disappointing stalemate on Saturday
Roma dropped vital points in the race for a Champions League place on Saturday after they were forced to settle for a 1-1 draw with Udinese.
The Giallorossi, on the back of three consecutive victories, took the lead inside 21 minutes when Erik Lamela netted his 12th goal of the season by sweeping home the rebound from Alessandro Florenzi's header which Zeljko Brkic parried out.
Yet Francesco Guidolin's men - despite suffering the misfortune of Thmas Heurtaux's red card - levelled on the hour mark as Luis Muriel embarked on a mazy run before firing a low strike between the legs of Maarten Stekelenburg.
ATALANTA 2-1 PESCARA
Cristian Bucchi began life as Pescara coach on a losing note after he failed to prevent a 2-1 defeat to Atalanta on Saturday.
The result came in spite of a strong start at the Azzurri d'Italia as Gaetano D'Agostino gave the Delfini a deserved advantage on 24 minutes with a terrific effort which soared into the top corner of the net.
However, Atalanta equalised from the penalty spot when Damiano Zanon hauled down Giacomo Bonaventura in the box, allowing German Denis to divert the ball past Ivan Pelizzoli.
And the Bergamese side secured the victory midway through the second half as Denis grabbed his second goal of the match thanks to a clever run and half-volleyed finish from Davide Biondini's cross.CHIEVO 2-0 NAPOLI
Napoli fell an alarming nine points behind Juventus atop the Serie A standings on Saturday after they crumbled to a 2-0 defeat at Chievo.
On 12 minutes, a free kick dropped to the feet of Boukary Drame who smashed a piledriver goalbound rom some way out to place the Flying Donkeys ahead.
Eugenio Corini's troops then put the result beyond any reasonable doubt on the break as Cyril Thereau brought down a raking pass before powering home a strike at the near post.
CAGLIARI 3-1 SAMPDORIA
Victor Ibarbo proved Cagliari's saviour on Sunday as he netted all three of the Sardinians' goals in a 3-1 win over Sampdoria at Is Arenas to end the Blucerchiati's six-match unbeaten run.
The hosts pulled ahead when Albin Ekdal's shot was followed up by Ibarbo, and the Colombian forward soon found his second with a smash-and-grab from a corner.
Ibarbo then showed his set-piece prowess once more from another corner - this time heading Andrea Cossu's cross past Sergio Romero at the far post.
Cagliari held on for a fourth win in six games despite Maxi Lopez's late penalty and Luca Rossettini's red card for taking down Eder as the last man.
PALERMO 1-2 SIENA
Palermo's future in Serie A looks increasingly bleak following Sunday's 2-1 home defeat to fellow relegation fodder Siena - thus extending their winless run to 15 matches.
The Rosanero took the lead when Anselmo swept up the rebound from Fabrizio Miccoli's corner which Cristian Terlizzi headed onto his own post.
But it wasn't to be their day as a mix-up between Ezequiel Munoz and his goalkeeper Stefano Sorrentino gifted Innocent Emeghara the opportunity to net his fifth goal in just six matches.
Their bad day at the office was confirmed when Emeghara was brought down in the box by Steve von Bergen, allow Alessandro Rosina to send the former Chievo shot-stopper the wrong way.PARMA 4-1 TORINO
Parma ended their recent rotten run with aplomb after Amauri's hat-trick saw them ease to an emphatic 4-1 success over Torino on Sunday.
Nonetheless, it was the Granata who drew first blood as Valter Birsa's drilled across the face of goal was touched in by Mario Santana at the back post.
Going one behind gave the hosts the impetus to bounce back, and so they did when Amauri conjured up a spectacular scissor kick from several yards out.
Moments later, Nicola Sansone took up the mantle of 'super-sub', coming off the bench to capitalise on Salvatore Masiello's misjudged clearance and rifle in the finish.
Amauri was then at the double as he cantered forward and held off a clutch of Torino defenders before blasting the ball home, and he soon hit his treble, wrapping up Sansone's intuitive wing play.
LAZIO 0-2 FIORENTINA
In the last of the weekend's action, Lazio fell further behind in the race for a top-three Serie A finish after they were defeated 2-0 by league rivals Fiorentina.
The Viola gained control of the Olimpico clash when Borja Valero's feint was read by Stevan Jovetic who responded to recent transfer speculation by powering a low finish into the bottom corner.
They then confirmed the triumph via a swing of Adem Ljajic's boot as the Serbian midfielder bent a free kick beyond Federico Marchetti in the Romans' goal.
Fiorentina have now won four of their last six fixtures and occupy fourth place in the league standings, but Lazio - on the other hand - have emerged victorious only once in their previous eight.