PARIS (AP) John Isner won a hard-fought all-American contest against Jack Sock 7-6 (6), 4-6, 6-4 to reach the semifinals of the Paris Masters on Friday.
PARIS, FRANCE - NOVEMBER 04: John Isner of the United States plays a forehand against Jack Sock of the United States during the Mens Singles quarter final match on day five of the BNP Paribas Masters at Palais Omnisports de Bercy on November 4, 2016 in Paris, France. (Photo by Dan Mullan/Getty Images)
Isner looked set for a straight-set win while served up a break at 4-3 in the second set but lost his temper after a foot-fault call.
Isner, who had not dropped his serve once since the start of the week, was unsettled by the decision and was broken twice in a row, allowing Sock back in the match.
But the change in momentum did not last long. Isner capitalized on Sock’s mistakes to break him twice early in the decider.
Isner equaled his best result at the indoor tournament, making it to the last four for the first time in five years in the French capital.
Watch Paris Masters Live on Tennis Channel all week