Bolt is running on Mars, says Maurice Greene

Former world champ Maurice Greene believes Usain Bolt remains in a world of his own as the Jamaican begins his attempt to add World Championship glory to his three Olympic gold medals.

Former world champ Maurice Greene believes Usain Bolt remains in a world of his own as the Jamaican begins his attempt to add World Championship glory to his three Olympic gold medals. Greene won the world title three times in succession (1997, 1999 and 2001) and believes Bolt will relieve defending champion Tyson Gay of his 100m and 200m titles in Berlin.

Maurice Greene

"Usain is running on Mars, everyone else is still on Earth," said Greene, who won world titles in Athens, Seville and Edmonton.

Usain Bolt runs the 100m quarter-finals in Berlin

"I'd tell Tyson to try to block everything else out. In the 2000 Olympics I told my manager it was my gold medal to lose and that's how Tyson has to approach it. That's how his mindset has to be. He has to believe."