GB's youngest Tokyo 2020 hopeful, Sky Brown, fractures skull in training

At the Tokyo Games in 2021, Brown is hoping break swimmer Margery Hinton's youngest GB athlete record, who was 13 years and 43 days old when she competed at the 1928 Olympics in Amsterdam. Boris Streubel/Getty Images for Laureus

Skateboarder Sky Brown, who is hoping to become Britain's youngest Olympian next year, fractured her skull and broke bones in her left hand after falling from a ramp during a training session in California.

Brown, 11, posted a video of the accident on Instagram and reassured supporters that she was doing fine and was going to work even harder when she returns.

"I don't usually post [videos of] my falls or talk about them, but this was my worst fall," Brown said. "I just want everyone to know that it's OK, don't worry, I'm OK.

"I'm going to push boundaries for girls with my skating and surfing. I'm going for gold in 2021 and nothing will stop me."

The BBC reported that Brown was taken to hospital by helicopter and was unresponsive on arrival but is expected to make a complete recovery.

"Sky landed head-first off a ramp on her hand," her father, Stewart, told the BBC.

"When she first came to hospital, everyone was fearful for her life. Sky had the gnarliest fall she's ever had and is lucky to be alive. [She] remains positive and strong, the whole medical team is shocked to see her positivity."

At the 2021 Tokyo Games, Brown is hoping to eclipse the record set by swimmer Margery Hinton, who was 13 years and 43 days old when she competed at the 1928 Olympics in Amsterdam.

Five sports, including baseball, skateboarding and surfing, will feature in Tokyo as part of the International Olympic Committee's revamp of the Games programme aimed to attract younger audiences.