Beating sister is no longer Gay's motivation

RALEIGH, North Carolina: As a youngster, Tyson Gay never thought about becoming an Olympic champion. Beating his sister in a race was a big enough challenge.

Now the soft-spoken Kentuckian finds himself in the biggest race of the Beijing Games, a 100m likely to feature the fastest men of all time - Gay, world record holder Usain Bolt and fellow Jamaican and former holder Asafa Powell.

"Getting a gold medal is my biggest motivation," Gay said after his stunning but wind-assisted run of 9.68 seconds to win the 100m at the US Olympic trials.