Watch as Napoli run riot with four goals in the opening 21 minutes, eventually inflicting a tennis-style 6-1 result on Sassuolo.
The Partenopei were still smarting after last week’s capitulation at Empoli and were determined not to repeat that upset.
A pair of Lorenzo Insigne corners were met by Kalidou Koulibaly and Victor Osimhen, then Chucky Lozano slid onto the Osimhen assist before Dries Mertens cut inside to blast in at the near post.
Mertens completed his brace by combining with Fabian Ruiz and Amir Rrahmani finished off a chaotic move for 6-0.
Maxime Lopez provided scant Sassuolo consolation.