RIO DE JANEIRO, July 27, 2008 (AFP) - The United States beat Serbia by three sets to one here Sunday to win the World men's volleyball League final in a crucial pre-Olympic boost.

The US won 26-24, 23-25, 25-23, 25-22 to lift the title.

On Saturday, they had defeated Olympic and world champions Brazil 3-0 while the Serbs had moved past Russia, likewise in three sets.

Saturday's defeat was a huge setback for Brazil, the five-time winners of the World League, just two weeks before the Beijing Olympics get underway.