Injured Serbian tennis player Janko Tipsarevic, right gives instructions to Dusan Lajovic of Serbia, left during their Davis Cup finals tennis singles match against Czech Republic's Tomas Berdych, in Belgrade, Serbia, Friday, Nov. 15, 2013.(AP Photo/Darko Vojinovic)

Serbia Davis Cup Tennis

Injured Serbian tennis player Janko Tipsarevic, right gives instructions to Dusan Lajovic of Serbia, left during their Davis Cup finals tennis singles match against Czech Republic's Tomas Berdych, in Belgrade, Serbia, Friday, Nov. 15, 2013.(AP Photo/Darko Vojinovic)

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