David's biggest win, however, was the World Junior Championships, played in Antwerp. It took just half an hour for the then 15-year-old Malaysian schoolgirl to obtain world junior champion status when she beat compatriot Leong Siu Lynn 9–5, 9–3 and 9–2 in the final of the women's individual event to become the youngest ever winner of the title. David reached the quarterfinals of the previous World Junior Championships in August 1997 in Brazil, as a thirteen-year-old and has since claimed both the Asian junior and senior titles, as well as the gold medal in the Asian Games in December 1998. David also is one of a few squash player to have won all the age categories in the British Junior Open.