 Complete the following phrase:  During his international career, Muscat represented the Australia U-20 side at the 1991 FIFA World Youth Championship in Portugal and the 1993 FIFA World Youth Championship in Australia. He represented the Australia U-23 side at the 1996 Summer Olympics. After making his full international debut for Australia in September 1994 against Kuwait, Muscat represented the national side at the 1997 FIFA Confederations Cup, 