Three years is a long time in sport, and all athletes have to deal with ups and downs, but few have quite experienced the challenge that emerging Chinese swimmer Yu Yiting has had to face: the sudden, if not entirely unexpected, rise of her teenage compatriot Yu Zidi. But despite facing some serious challenges from the much younger swimmer, Yu Yiting rediscovered her form just before the Asian Games and took her medal tally in Japan to four on Wednesday, storming back from behind at the turn to...