Soundbites on Phelps' Olympic performance
Comments from the world of sports and beyond on Michael Phelps' record-setting Games.
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Roger Federer on Phelps
Roger Federer of Switzerland celebrates with his gold medal after he and partner Stanislas Wawrinka defeated Thomas Johansson and Simon Aspelin of Sweden in the men's doubles gold medal tennis match at the Beijing 2008 Olympic Games. Federer lauded swimmer Michael Phelps' accomplishments at the Olympics.
"What he's doing is quite incredible. He's been doing it for so many years," Federer said. "He's doing it in different competitions at different lengths. He's very impressive and he's one of the greatest athletes out there at the moment."