Sock Beats Cilic to End American Drought at ATP Finals
Jack Sock became the first American to win a match at the ATP Finals since 2007 on Tuesday, downing Croat Marin Cilic 5-7, 6-2, 7-6(4) in his second match in round-robin play at the O2 Arena in London, England. Sock lost his opening match to Roger Federer but improved to 1-1 in the early…

