Athens:Asafa Powell set a new 100 metres world record in a time of 9.77 seconds at the Olympic Stadium in Athens. The 22-year-old Jamaican improved Tim Montgomery's previous record of 9.78 set in Paris in September 2002. His run came with a tailwind of 1.6 meters per second, below the legal limit of 2.0. Powell is only the fourth non-American to hold the 100 metres world record since 1912. Donovan Bailey of Canada (1996), Armin Hary of West Germany (1960) and Percy Williams of Canada (1930) are the others. Powell's run has removed a degree of controversy from the world record. Montgomery's time of 9.78 could be discounted if the Court of Arbitration for Sport rules that the American has been guilty of doping offences.