Napoli's Lorenzo Insigne scores their second goal during the match Serie A Napoli vs Juventus at Stadio San Paolo, Naples, Italy, January 26, 2020. Serie A leaders Juventus suffered a shock 2-1 defeat at Napoli on Sunday. REUTERS/Alberto Lingria

Napoli's Piotr Zielinski celebrates scoring their first goal with Arkadiusz Milik during the match Serie A Napoli vs Juventus at Stadio San Paolo, Naples, Italy, January 26, 2020. REUTERS/Alberto Lingria

Juventus' Federico Bernardeschi in action with Napoli's Piotr Zielinski during the match Serie A Napoli vs Juventus at Stadio San Paolo, Naples, Italy, January 26, 2020. REUTERS/Alberto Lingria

Juventus' Gonzalo Higuain in action with Napoli's Diego Demme during the match Serie A Napoli vs Juventus at Stadio San Paolo, Naples, Italy, January 26, 2020. REUTERS/Alberto Lingria

Napoli's Mario Rui in action with Juventus' Paulo Dybala during the match Serie A Napoli vs Juventus at Stadio San Paolo, Naples, Italy, January 26, 2020. REUTERS/Alberto Lingria

Juventus' Wojciech Szczesny and teammates look dejected after Napoli's Lorenzo Insigne scores their second goal during the match Serie A Napoli vs Juventus at Stadio San Paolo, Naples, Italy, January 26, 2020. REUTERS/Alberto Lingria