Rafael Nadal won the Olympic men's singles gold medal Sunday, overcoming two set points in the second set and holding every service game to beat Fernando Gonzalez of Chile 6-3, 7-6 (2), 6-3. Elena 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. ...