NEW YORK—Andy Roddick relishes his role as a mentor ... above themselves—or not being able to hit much of a ball," said Roddick. "He (Sock) came out and had break points early.

White and Blue that have been hoisted on his 24-year-old shoulders – and those of peers John Isner and more – since Andy Roddick retired at the US Open in 2012. At other times, Sock's convers ...