Tommy Haas and Alexander Waske won the decisive doubles match on Saturday to help Germany defeat Argentina 2-1 to claim the ARAG ATP World Team Championship.

On Friday, the duo beat Tommy Robredo and Santiago Ventura, 7-6 (7-3) 6-3 to lift Germany to a 2-1 triumph over Spain in the Blue Group decider.

Against Red Group winners Argentina, Haas and Waske routed Guillermo Coria and Gaston Gaudio - last year's French Open champion and runner-up, respectively - 6-1 6-2.

Coria had given Argentina a 1-0 lead with a 6-1 6-1 romp over Florian Mayer, but Haas responded with a surprise 6-4 6-3 victory over Gaudio, setting up the doubles match for the title.