Zhang reaches end of her rainbow

Her coach credits mental toughness for miracle run

Zhang Shuai's transformation from emotional wreck to Grand Slam quarterfinalist has been the feel-good story of the Australian Open, but also counts as a triumph for her faithful coach, Liu Shuo.

Zhang's amazing run came to an end on Wednesday when she lost 6-4, 6-1 to Britain's world No 47 Johanna Konta in the final eight - but not before the Chinese qualifier's fighting spirit was once again on full display.