Editor's note: In selecting our picks, an "early exit" must be by a player currently seeded in the top 10, and a "sleeper" is someone outside the top 10.

Cliff Drysdale was a U.S. Open singles finalist in 1965. Seven years later, he was named the inaugural president of the Association of Tennis Professionals. That same year, the South African, teamed with Roger Taylor, became a U.S. Open doubles champion.

Today, at the age of 70, he remains a popular tennis ...

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