Napoli saw their Scudetto hopes practically evaporate and Gonzalo Higuain lose the plot in a 3-1 defeat to Udinese.
Pipita scored his 30th goal of the season, but had to be dragged away by teammates after a red card.
Juventus now extend their lead at the top to six points with seven rounds remaining.
However, as the Bianconeri have a superior head-to-head record, the gap is in reality seven points.
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