Shelly-Ann Fraser-Pryce (right) of Jamaica competes in the women's 100 meters final race at the Doha Diamond League on May 28 in Doha, Qatar. Photo: IC

Sprinting legend Usain Bolt believes the only person that can stop his fellow Jamaican Shelly-Ann Fraser-Pryce from winning a third Olympic 100 meters title at the Tokyo Games is herself.

Only Bolt, at the last three Olympics, has previously managed the feat so Fraser-Pryce would become the first woman to bag a hat trick of 100 meters gold medals if she wins the final on July 31.

"Shelly is the only person who can lose this race," Bolt said. "I hope she doesn't put too much pressure on herself going in because she's in form, all she has to do is go out there and execute.

"I'm looking forward to seeing her and I would be happy to share something like that, to win three Olympics with someone like Shelly-Ann Fraser-Pryce, as my countrywoman," the retired sprinter added.

While Bolt won his trio of 100 meters golds at successive Games, Fraser-Pryce won the title at Beijing 2008 and London 2012, but managed just a bronze behind compatriot Elaine Thompson-Herah and American Tori Bowie in Rio de Janeiro.

The diminutive Fraser-Pryce clocked the fastest 100 meters time in more than three decades in 10.63 seconds in Kingston on June 5. Bolt was not surprised to see her running so well at the age of 34.

"I can see that she adjusted her technique this season a lot and that's what's helping her to run so fast because now she's a lot more fluent and upright in the last ending of her race," he said.

Reigning champion Thompson-Herah, who won the 200 meters to complete the sprint double in Rio, ran 10.71 seconds in Hungary on July 6, and the biggest threat to Fraser-Pryce's record bid, according to NBC analyst and former sprinter Ato Boldon.

"I don't see anybody other than Thompson-Herah or Fraser-Pryce winning the Olympic 100 meters," said the Trinidadian, who won four sprint medals at two Olympics.

"That's not a hard prognostication to make because those two have been the dominant sprinters of their generation and Fraser-Pryce has been the most dominant ever."

Fraser-Pryce also enters the Tokyo Games as the second-fastest woman over 200 meters this season on the back of the career-best 21.79 that won her the Jamaican trails final in June.

American champion Gabby Thomas leads the world, however, with her run of 21.61 at the US trials the second-fastest of all-time behind Florence Griffith-Joyner's 1988 world record of 21.34.

Bolt, though, does not think a first Olympic gold in the half-lap event and a Tokyo sprint double for Fraser-Pryce is out of the question.

"I think the 200 meters is going to be a lot tougher after coming from the 100 meters," he said. "I believe in her... It shouldn't be a problem as long as she's focused and continues pushing forward."