Napoli squandered a two-goal lead as Lorenzo De Silvestri snatched a 2-2 draw for Bologna against the Serie A champions, who appear set to lose Scudetto-winning coach Luciano Spalletti.
Spalletti said a decision has been made on his Napoli future before kick-off, with many expecting the Partenopei boss to depart, yet his side initially appeared far from distracted at Stadio Renato Dall'Ara.
Victor Osimhen seized on an early Lukasz Skorupski mistake to open the scoring before doubling his – and Napoli's – tally after 54 minutes with a powerful finish across goal.
However, Lewis Ferguson halved the arrears just past the hour before De Silvestri headed home with six minutes remaining, and only the offside flag denied Nicola Sansone a late winner as Napoli were forced to cling on.
A terrible pass from Bologna goalkeeper Skorupski gifted Napoli their 14th-minute opener as Osimhen intercepted on the edge of the area and finished into an empty net.
Skorupski somewhat made amends by thwarting both Osimhen and Alessio Zerbin as Napoli threatened to extend their lead before the break.
Marko Arnautovic skimmed a rare Bologna chance across the face of an empty goal after the interval before Osimhen furthered Napoli's advantage.
The Napoli striker rolled onto Bartosz Bereszynski's delicate throughball before firing through the legs of Skorupski.
An unmarked Ferguson pulled one back shortly thereafter, tapping in a rebound after Pierluigi Gollini saved from Sansone, who subsequently assisted De Silvestri's headed equaliser with a delightful corner.
Sansone then thought he had snatched a late victory with a one-on-one finish, only to be denied by a belated offside flag.