World record holder Wilson Kipketer, who once dominated middle distance races, has announced his retirement at age 34.
The Kenyan-born Kipketer now runs for Denmark and still holds the world record in the 800 meters race (one minute, 41.11 seconds).
He won the world championships in 1995, 1997 and 1999 as well as an Olympic silver medal in 2000 and a bronze medal in 2004. Kipketer said that last year's Olympic result showed him he could not win gold and said he will not try again in Beijing.
Kipketer had originally planned to quit after next year's European Championships in Sweden. But he has yet to race this year and decided that now is the time to hang up his shoes for good.
Kipketer now serves as an ambassador for the International Association of Athletics Federations, the world governing body of track and field.