World No.1 Roger Federer remains in the running to win his first Olympic singles gold medal. The Swiss star faced Julien Benneteau of France in the second round, a familiar opponent who led Federer by two sets on the same court just last month. Federer saved two match points in that meeting before coming back to win a stunning 5-set match under the roof on Centre Court, but faced no such threat today.

Federer swept past Benneteau 6-2, 6-2 in just an hour and will now play Uzbekistan's Denis Istomin.

"I was able to put in another solid performance today," Federer said. "There was a bit of a swirly wind and I think he might have struggled a little bit with his serve in these conditions, whereas indoors it is straightforward and you can get great rhythm."

Meanwhile, American Andy Roddick won his first-round match on the courts at Wimbledon against Martin Klizan of Slovakia, 7-5, 6-4.

Roddick dominated with his serve, which continues to prove an effective weapon on grass. He lost only nine points in 11 service games. However, on the receiving end he was only able to convert two of 13 break point chances.

"I served really well," Roddick said. "I would have liked to have converted more break points. But I got a couple and, thankfully, that's all I needed."

Roddick, who did not compete in Beijing, is unseeded and will now face Novak Djokovic in the second round.

"The guy has been the best player in the world over the last couple of years," Roddick said. "It's going to be tough. But the situation, we've both been through it a million times. I'm going to have to serve well and take some chances on returns."

Novak Djokovic is unlikely to be thrilled about facing such an experienced grass court player so early in the tournament. The Serbian sensation battled past Fabio Fognini of Italy 6-7 (7), 6-2, 6-2 in his opening round which included several rain delays.

"I haven't played an official match since Wimbledon, so it took me a set and a half to really get into a rhythm," he said. "Obviously the rain delay affected the game, and I wasn't sharp enough after the rain delay."

Djokovic will need to come out strong and energized if he hopes to ease past Roddick. If he fails to do so, the American's infamous serve is more than capable of posing ample problems for the former world No.1. Roddick, on the other hand, will have to attack Djokovic's serve whenever possible in order to convert break points.