Watch as Napoli maintained their 100 per cent record with Victor Osimhen grabbing a goal and earning a penalty for Lorenzo Insigne against Cagliari.
The Partenopei secured their sixth win out of six, scoring 16 goals and conceding just two.
Osimhen was unstoppable from the start, meeting a Piotr Zielinski pull-back from close range to open the scoring.
After a couple of efforts off target, he was brought down by Diego Godin and Insigne converted the spot-kick.
Andre-Frank Zambo Anguissa went close to his debut goal, drilling inches wide.