Atalanta dealt Serie A leaders Napoli a surprise 2-1 defeat, thanks to Ademola Lookman's stunning early brace, Nigeriasoccernet.com reports.
Lookman struck twice in the first half, capitalizing on Atalanta's tactical masterclass that caught Antonio Conte's side off guard.
The opener came when Matias Olivera's clearance was flicked on by Charles De Ketelaere, allowing Lookman to volley home from a tight angle.
The visitors doubled their lead as De Ketelaere's counter-attack and cross-field pass found Lookman, who cut inside Giovanni Di Lorenzo and bent a right-foot scorcher past Alex Meret.
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Napoli substitute Ernesto Retegui reduced the deficit with a splendid low volley, but Atalanta held on for a crucial win.
Retegui's over-celebration sparked tension, with Pasquale Mazzocchi and Berat Djimsiti reacting angrily.
This victory marks Atalanta's second consecutive win at Napoli's home, following last season's 3-0 triumph.
By Olujimi Dare Ogun