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PARIS, FRANCE - NOVEMBER 5 : Finalist Filip Krajinovic of Serbia, winner Jack Sock of USA during the trophy ceremony following the final on day 7 of the Rolex Paris Masters 2017, a Masters 1000 ATP World Tour event held at AccorHotels Arena on November 5, 2017 in Paris, France. (Photo by Jean Catuffe/Getty Images)

PARIS, FRANCE - NOVEMBER 5 : Finalist Filip Krajinovic of Serbia, winner Jack Sock of USA during the trophy ceremony following the final on day 7 of the Rolex Paris Masters 2017, a Masters 1000 ATP World Tour event held at AccorHotels Arena on November 5, 2017 in Paris, France. (Photo by Jean Catuffe/Getty Images)