Lleyton Hewitt, of Australia, watches his return of serve from Michael Russell, of the United States, in the quarterfinals at the U.S. National Indoor Tennis Championships on Friday, Feb. 14, 2014, in Memphis, Tenn. (AP Photo/Rogelio V. Solis)

Memphis Tennis

Lleyton Hewitt, of Australia, watches his return of serve from Michael Russell, of the United States, in the quarterfinals at the U.S. National Indoor Tennis Championships on Friday, Feb. 14, 2014, in Memphis, Tenn. (AP Photo/Rogelio V. Solis)

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