THE finalists of this month's Reebok Asia-Pacific Championships will have to wait for the chance to gain valuable tips from Chinese American star Michael Chang. Chang was to give a coaching clinic during January's Australian Open for the winners and runners-up of the boys' and girls' singles events at Victoria Park from December 27 to 31. But Chang will not be taking part in the first Grand Slam event of the new season. Mark Livesey, of organisers Pro-Tennis Asia, said they are still hoping to arrange a clinic later on next year. Said Livesey: ''Next year, we will have at least 10 Challenge tournaments around Asia and we would be looking to get Chang down to one of these events. ''The Australian Open did not fit into his schedule.'' The success of the tournament, which is held in conjunction with Chang, has seen 10 countries join the fray, with Hong Kong hosting the culmination of a year-long qualifying series. The top eight players from the eight countries that hosted challenge events, plus invited players from China and Singapore will participate at Victoria Park. A total of 38 players will compete for the boys' singles and doubles titles with 38 players involved in the girls' singles. Other countries represented are the Philippines, Thailand, Malaysia, South Korea, Japan, Indonesia and Taiwan. To ensure that players have the chance to take on opponents from other countries, the draw has been divided into four sections with, wherever possible, one player from each country in each quarter. Defending champion in the boys' singles, Taiwan's Chen Wei-ju, returns along with compatriot Weng Tzu-ting, the leading junior in the girls' event. Hong Kong's Willy Chan is also one of the leading contenders.