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Spain to face Argentina in Davis Cup final

AP reports:

Novak Djokovic's ailing back didn't hold up Sunday, meaning Rafael Nadal won't have to face his main rival in the Davis Cup final.

Djokovic tried to help Serbia stage a comeback in its semifinal against Argentina despite a lingering back problem, but had to retire when trailing 7-6 (5), 3-0 against Juan Martin del Potro. That sent Argentina into the final against Spain, which advanced after Nadal routed Jo-Wilfried Tsonga 6-0, 6-2, 6-4 on clay in Cordoba.

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