Serbia's Filip Krajinovic, left, and his partner Nenad Zimonjic talk tactics during their Davis Cup World Group play-off first round doubles tennis match against Switzerland's Marco Chiudinelli and Michael Lammer, in Novi Sad, Serbia, Saturday, Feb. 1, 2014. (AP Photo/Darko Vojinovic)

Serbia Switzerland Davis Cup Tennis

Serbia's Filip Krajinovic, left, and his partner Nenad Zimonjic talk tactics during their Davis Cup World Group play-off first round doubles tennis match against Switzerland's Marco Chiudinelli and Michael Lammer, in Novi Sad, Serbia, Saturday, Feb. 1, 2014. (AP Photo/Darko Vojinovic)

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