Sam Querrey, of the USA, serves an ace to Dudi Sela, of Israel, at the BB&T Atlanta Open on Wednesday, July 23, 2014, in Atlanta.   (AP Photo/Atlanta Journal-Constitution, Curtis Compton)

Atlanta Open Tennis

Sam Querrey, of the USA, serves an ace to Dudi Sela, of Israel, at the BB&T Atlanta Open on Wednesday, July 23, 2014, in Atlanta. (AP Photo/Atlanta Journal-Constitution, Curtis Compton)

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