Piotr Zielinski and Lorenzo Insigne struck to earn Napoli a 2-1 win against Juventus, whose coach Maurizio Sarri was circumspect.
Piotr Zielinski and Lorenzo Insigne scored in the second half as Napoli beat Serie A champions Juventus 2-1 at home on Sunday.
Juventus have left three first-team players out of their travelling party following reports of imminent transfers.
Barcelona have cashed in on a young talent after Juventus stepped in, but have taken Matheus Pereira on loan from the Italian giants.
Maurizio Sarri returns to his former club Napoli with Serie A leaders Juventus on Sunday, and the veteran boss has given a retirement hint.
Unwanted at Juventus, Emre Can is a target for three of Europe's biggest clubs.
Linked with Manchester United and Tottenham, Paulo Dybala said he was "close to leaving" Juventus.
Alvaro Odriozola is giving Hansi Flick food for thought for his Bayern Munich line-up, having impressed since arriving on loan.
Juventus' winning run has given Maurizio Sarri encouragement as he suggests they face their toughest title race in several seasons.
Juventus beat Roma 3-1 in their Coppa Italia quarter-final after goals from Cristiano Ronaldo, Rodrigo Bentancur and Leonardo Bonucci.