Los Angeles: Michael Phelps will put the finishing touches on his glittering Olympic career in London, where the swimming superstar says he has nothing left to prove -- but plenty to achieve.
"I don't think anything he could do or not do could change his legacy," longtime coach Bob Bowman said. "He's the greatest Olympian of all time today. He will be after this summer."
That's the title Phelps seized four years ago in Beijing, where his stunning sweep of eight gold medals in eight events gave him a career tally of 14 gold medals -- the most of any Olympian -- and two bronze.