 Complete the following phrase:  As an amateur, Doherty won the Irish Amateur Championship twice, the World Under-21 Amateur Championship and the World Amateur Championship. Having turned professional in 1990, Doherty has won a total of six ranking tournaments, including the 1997 World Snooker Championship in which he defeated Stephen Hendry, inflicting Hendrys first loss in a world final. This made him the first and only player in the history of the game to be the world amateur, world under21 and the world professional champion. The following year, he came very close to breaking the Crucible curse, reaching the 