Roberts went on to coach the Australian national futsal team from 1992 until 2000. Under his stewardship, the team qualified for and competed at the 1992 FIFA Futsal World Championship in Hong Kong, the 1996 FIFA Futsal World Championship in Spain, and the 2000 FIFA Futsal World Championship in Guatemala. At the time of his retirement from coaching in 2000, he was one of only four national team coaches in history to have participated in three FIFA futsal world cups. The national team played 66 games under his leadership.