Rafael Nadal and Elena Dementieva have won gold medals in the 2008 Olympics. According to the Associated Press, "Nadal... beat Fernando Gonzalez of Chile 6-3, 7-6 (2), 6-3. The gold medal was the first ever for Spain in Olympic tennis, and another milestone in an astounding summer surge by Nadal, who will officially end Roger Federer’s 41/2-year reign atop the rankings Monday." Meanwhile, "Dementieva earned the gold in women’s singles, taking advantage of 17 double-faults by fellow Russian Dinara Safina to win 3-6, 7-5, 6-3." In addition, the Williams sisters won gold in the women's doubles.
Nadal wins gold medal in Olympic tennis - Olympics - Yahoo! Sports