Andre Frank Zambo Anguissa was on target with the equaliser after an Alex Meret howler, as Napoli were held to a 1-1 friendly draw by SPAL.
Rudi Garcia was forced to make a change after just 33 minutes when Mario Rui limped off with a muscular problem, to be replaced by Matias Olivera.
Matteo Politano and Michael Folorunsho went close and Alessandro Zanoli was denied by a save in the first half.
Coach Garcia changed 10 of his starting XI after the restart, including Victor Osimhen and Giacomo Raspadori, while Kvicha Kvaratskhelia smashed a finish against the crossbar on the Nigerian’s assist.
SPAL took the lead against the run of play when Filippo Puletto took a free kick from the centre-circle and caught Meret off his line with the audacious long-range lob.
Osimhen got irritated with the SPAL players for a couple of rough tackles, but he helped create the equaliser with an inspired dummy to let through Piotr Zielinski’s pull-back from the left, allowing Anguissa to sweep in from 12 yards.
Napoli 1-1 SPAL
Puletto 62 (S), Anguissa 73 (N)
Napoli First Half: Gollini; Zanoli, Ostigard, Juan Jesus, Mario Rui; Folorunsho, Demme, Elmas; Politano, Simeone, Zedadka
Napoli Second Half: Meret; Di Lorenzo, Obaretin, Rrahmani, Olivera; Anguissa, Lobotka, Zielinski; Kvaratskhelia, Osimhen, Raspadori