Rafael Nadal has clinched at least a silver medal by beating Novak Djokovic 6-4, 1-6, 6-4 in the Olympic semifinals. Nadal's opponent in the final Sunday will be Fernando Gonzalez of Chile, who beat James Blake of the United States earlier Friday. Djokovic can still win a bronze. The medal will be the first for Nadal, who came to Beijing assured of earning the No. More...