Llodra, who won in Marseille in 2010, lost his serve once in each set and could not force a single break point chance against del Potro, who hit 11 aces to 10 for the Frenchman.

It took four hours and 26 minutes, but Roger Federer is now guaranteed a singles medal at the London Olympics after defeating Juan Martin del Potro, 3-6, 7-6 (5), 19-17 in the semifinals.

NEW YORK (Reuters) - World number one Rafa Nadal knew powerhouse Juan Martin del Potro's biggest weakness was his shaky backhand, and the Spaniard exploited the vulnerability repeatedly at their U.S.