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John Isner of US (R) talks with Jack Sock of US (L) as they hold the trophies after winning against Henri Kontinen of Finland and John Peers of Australia in their men's double final match at the Shanghai Masters tennis tournament in Shanghai on October 16, 2016. / AFP / WANG ZHAO (Photo credit should read WANG ZHAO/AFP/Getty Images)

John Isner of US (R) talks with Jack Sock of US (L) as they hold the trophies after winning against Henri Kontinen of Finland and John Peers of Australia in their men's double final match at the Shanghai Masters tennis tournament in Shanghai on October 16, 2016. / AFP / WANG ZHAO        (Photo credit should read WANG ZHAO/AFP/Getty Images)