Up-and-coming squash star Annie Au Wing-chi has done it again. She defeated Rebecca Chiu Wing-yin 3-1 in the finals of the Crocodile Squash Challenge Cup 2009 on Sunday. It was Au's second victory over Hong Kong's No 1 women's player in a final. This proves that she has the potential to become the top female player in town, observers believe. Also, Sunday's victory gave the 20-year-old her first Challenge Cup championship. Head coach Tony Choi Yuk-kwun said he was happy to see Au win the title because it proved that young squash players in Hong Kong are doing better. 'Rebecca's loss doesn't mean she is declining, but that Annie is improving. There is keen competition, which is good,' Choi said. Au said she wants to do well in competitions over the next two months, and boost her world ranking to the top 16. She said winning against a role model such as Chiu, 30, was important to her. Au was also happy that her younger brother, Leo Au Chun-ming, 19, made it through to the men's final. 'Leo played very well. He's improved a lot in a year, which surprised me,' she said. 'We often encourage and push each other to perform well.' According to Choi, Leo - who lost to champion Dick Lau Siu-wai in straight sets - played well to take the silver. In the semi-finals on Saturday, Leo produced a superb performance to oust top seed Bradley Hindle of Australia 3-1. Leo said the victory was a 'real confidence boost' and provided valuable experience. Leo has just finished his A-levels and will soon be joining his elder sister at university. But he said he would use the summer break to work harder on his game. 'During this summer vacation, I can put my studies aside for a while and concentrate on playing squash. I'll try very hard to get the best results and become as strong as my sister,' Leo said.