That win put pressure on Napoli to respond in kind and they did in style as Edinson Cavani and Gökhan Inler both scored twice as Napoli won in style.
The match was was just nine minutes old when Inler set the tone with a rasping long-range strike. A beautifully crafted move culminated in an unerring Marek Hamšík finish six minutes later, before Birkir Bjarnason reduced the deficit.
Napoli wrested back the initiative after the break when Cavani converted from the spot, and he subsequently doubled his tally with a sumptuous finish. Not content with their lot, Inler’s spectacular second made it five.
In fifth, Lazio edged Parma 2-1, and their sixth-placed city neighbours AS Roma ran out 3-1 winners at Siena, with Mattia Destro scoring twice.