The sky is the limit for Chinese swimming starlet Yu Zidi after the teenage girl stormed to her maiden Asian Games gold medal on her regional multi-sport games debut on Sunday. Yu powered to the women’s 200 metres butterfly crown, leading from start to finish at the Tokyo Aquatics Centre before touching the wall first in a Games-record time of two minutes and 5.08 seconds, taking over the honour from compatriot Zhang Yufei, who set the time in Hangzhou three years ago. Yu, 13, was already three...