Watson's Athletic Club (WAC) athletes yesterday turned in some impressive performances in winning two bronze medals on the opening day of the Thailand track and field championships in almost 40-degree Celsius temperatures. WAC's top sprinter Li Vai-kuen had a particularly good run in the men's 400 metres final. He crossed the line in a time of 48.07 seconds to set a Hong Kong Amateur Athletic Association record. Li finished third behind Sri Lankan sprinter Sugath Thilakarathne, who took the gold medal with a time of 47.11. Li's effort was against strong opposition from Malaysia, Thailand and Sri Lanka. All were tuning up for this summer's Olympic Games in Atlanta with outings at the Thailand National Stadium. WAC's second bronze medal performance came from Anthea Li Chun-nei, who leapt 11.96 metres for a season's best performance in the women's triple jump event. Pauline Lee Po-ling came in fourth with a respectable effort of 11.04. Alan Cheung was WAC's second track finalist. Cheung finished fifth in the men's 110-metre hurdles in a time of 15.34 seconds. Yap Kai-tak clocked four minutes and 1.3 seconds to finish ninth in the men's 1,500 metres final, which featured a field of 19 runners. Steven Ellison, representing Hong Kong, was forced to withdraw from the gruelling men's decathlon due to a leg injury when lying in fifth position after four events. The main HKAAA medal hope, Wan Kin-yee, has her first outing today in the women's 200 metres event.