Atalanta stunned Serie A leader Napoli 3-0 thanks to a brace from Ademola Lookman in the first half. Despite the absence of the league's top goalscorer, Retegui scored twice in the first half to inflict what was only Napoli's second defeat of the season. The Atalanta coach opted to drop Retegui and pick Lookman and Charles De Ketelaere in attack, …