DONOVAN BAILEY, the 1996 Olympic champion, picks World 100m record holder Usain Bolt to win in Beijing.

Bailey, whose gold medal run in Atlanta was a world-record 9.84 seconds, believes it is going to take something flawless from one of the world's top sprinters - Tyson Gay or Asafa Powell -- to stop Bolt.

The Jamaican-born Bailey, who represented Canada, said the power Bolt displays in the latter part of his race meant Gay or Powell would have to produce something special to hold out to the end.

Flawless start

"For Tyson or Asafa to beat Usain, they would need to have a flawless start and a flawless acceleration phase and still stay relaxed," Bailey was quoted as saying in an article published on the Sport Illustrated website.

"You know he's coming, and even if you get one metre ahead - even two metres ahead - he can make that up in three or four strides."

On Tuesday, Bolt, was beaten by Powell at the DN Galan meet. Powell won in 9.88, while Bolt finished in 9.89.

However, Bailey said: "It almost seemed like Usain had another turbo gear that he hadn't unleashed yet. Like it was a 120m race."