 Complete the following phrase:  Many former champions have gone on to play on the world tour such as Colm Gilcreest, David Morris, Vincent Muldoon, Brendan ODonoghue, Rodney Goggins and most noticeably Ken Doherty who won the compition in 1987 and 1989 and would go on to become the only former champion to win the World Snooker Championship in 