For Japanese gymnast Hikaru Mori, a performance at the Tokyo Olympic Games could have been another highlight of an up-and-down trampoline career that began on a supermarket rooftop garden 18 years ago.

The reigning world champion, however, crashed out in the women's qualifying round on Friday after an uncharacteristic flop denied her a place in the final.

Mori said she had no regrets over her early exit, but also admitted to cracking under the pressure of being a gold medal favorite.