How gold can she go? Biles shines in training amid virus worries

TOKYO: Defending Olympic all-around champion Simone Biles shone in training on Thursday in a series of sharp routines that included a vault so difficult that no other woman has ever attempted it in competition.

Biles, 24, has not lost a competition since 2013 and is aiming to become the first woman to win back-to-back Olympic all-around golds in over 50 years as well as improve on her Rio haul of five medals, four of them gold. She made two attempts at the Yurchenko Double Pike vault, rolling her landing on the first one but performing the second almost flawlessly, surprising the handful of watching media and officials - including one of her coaches.