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