Early results in friendlies against local opposition were not great .
Perth became the first team to defeat Sydney FC , winning 1 -- 0 in the semi-final of the 2005 -- 06 Pre-season Cup before losing in the final 0 -- 1 to the Central Coast Mariners .
Early results in friendlies against local opposition were not great , but Perth became the first team to defeat Sydney FC , winning 1 -- 0 in the semi-final of the 2005 -- 06 Pre-season Cup before losing in the final 0 -- 1 to the Central Coast Mariners .