After Milan's heavy loss to Atalanta on Sunday evening, Napoli had the chance to all but book their place in next season's Champions League with a win over Bologna.
Instead, they have been left stunned at the halfway point at the Diego Armando Maradona Stadium.
The visitors took the lead after just nine minutes, Federico Bernardeschi finishing off a fine team move with a fantastic arrowed strike into the top-right corner that left Vanja MilinkoviΔ-SaviΔ grasping at air.
Not content to just sit on their 1-0 lead, Bologna doubled their lead through a Riccardo Orsolini penalty.
The spot kick was awarded after VAR ruled that Giovanni Di Lorenzo had fouled Juan Miranda in the box.
Di Lorenzo then went from zero to hero in first-half added time as the Napoli captain popped up with a crucial strike to half the deficit.
Can Antonio Conte's side complete the comeback or will Bologna blow the top four race wide open with just two games to go?
