Donald Young, of the United States, celebrates after defeating countryman John Isner in a quarterfinal at the Memphis Open tennis tournament Friday, Feb. 17, 2017, in Memphis, Tenn. (AP Photo/Mark Humphrey)
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Donald Young, of the United States, celebrates after defeating countryman John Isner in a quarterfinal at the Memphis Open tennis tournament Friday, Feb. 17, 2017, in Memphis, Tenn. (AP Photo/Mark Humphrey)
