MILAN (AP) — Kevin De Bruyne’s goal could prove costly for Napoli despite it setting the defending champion on the way to a 3-1 win over Inter Milan and back to the top of Serie A on Saturday.

De Bruyne appeared to pull a muscle as he converted a first-half penalty, immediately clutching the back of his right thigh. The former Manchester City player looked distraught and had to be helped off the field by two medical staff.

Scott McTominay and Frank Anguissa also scored for Napoli after the break, either side of an Inter penalty converted by Hakan Çalhanoğlu.

The result got Napoli back to winning ways — after last weekend’s loss at Torino and Tuesday’s chastening 6-2 defeat at PSV Eindhoven in the Champions League — and lifted it a point above second-placed AC Milan, which drew against P

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