The supporters were angry at their side’s failure to complete the signing of Roberto Soriano from Sampdoria before the deadline and a general lack of investment over the summer.
“We are [sporting director Cristiano] Giuntoli, to your surprise we are saving on spending,” declared one sarcastic banner put up by irate fans overnight as discovered by NapoliMagazine.
“ADL [president Aurelio De Laurentiis] is without any form of defence, game over,” read the other painted bed sheet.
A group of Napoli supporters had previously called on fellow fans to boycott the 2-2 draw at home to Sampdoria due to their frustration with the ownership and a perceived lack of signings during the transfer window.
The Partenopei are yet to win in the 2015-16 Serie A season and gave up a lead away at Sassuolo before going on to lose and a two-goal advantage was squandered as Samp came back to draw at the Stadio San Paolo.