Napoli missed the chance to go level with Serie A leaders Juventus after tumbling to a 3-0 defeat at Sampdoria.
Juve moved three points clear courtesy of Saturday's 2-1 win at Parma, but Napoli were undone by two first-half goals from Sampdoria's Gregoire Defrel and Fabio Quagliarella's second-half strike.
Defrel, on a season-long loan from Roma, fired home rising shots in the 11th and 32nd minutes and Quagliarella added a third in the 75th minute to secure Sampdoria's first win of the season and send Napoli to their first defeat.
Quagliarella's remarkable effort wrapped up victory, and you can watch it below:
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