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Paris Saint-Germain opened up an eight-point lead at the top of Ligue 1 on Wednesday after a 4-1 victory at Monaco.
Kylian Mbappe scored against his former side when he combined with Angel Di Maria after 14 minutes.
Neymar struck from a penalty on the stroke of half-time, slotting home in stoppage time after Kamil Glik fouled Layvin Kurzawa.
Pablo Sarabia's 72nd-minute volley wrapped up the points as PSG ran out comprehensive winners at Stade Louis II.
Tiemoue Bakayoko scored a consolation for the hosts with three minutes remaining, but Mbappe completed his brace during stoppage time off an assist from Neymar.