Bob Bryan, left, and Mike Bryan of the U.S. sign autographs after defeating Australians Chris Guccione and Lleyton Hewitt, 7-5, 6-3 on Friday, April 11, 2014 at the U.S. Men's Clay Court Championship at River Oaks in Houston, Texas.  (AP Photo/the Chronicle, Thomas B. Shea)

Hoston Tennis

Bob Bryan, left, and Mike Bryan of the U.S. sign autographs after defeating Australians Chris Guccione and Lleyton Hewitt, 7-5, 6-3 on Friday, April 11, 2014 at the U.S. Men's Clay Court Championship at River Oaks in Houston, Texas. (AP Photo/the Chronicle, Thomas B. Shea)

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