Novak Djokovic helped Serbia beat the Czech Republic and advance to the United Cup quarterfinals. Despite appearing to be troubled by an injury to his right wrist, the world number one fought through the pain to beat Jiri Lehecka and keep his country in the tournament. After winning the first set, Djokovic lost the second but came back strongly in the third to win the match. Initially, officials declared that Serbia had qualified for the quarterfinals, but this was later revised, and Djokovic opted not to play in the mixed doubles. Serbia progressed to the quarterfinals, where they will face the winners of Group C, Australia. In other matches, Chile beat Greece, and the Netherlands beat Croatia, setting up a quarterfinal clash between the Dutch and the Australians.