Western United inaugural signing and championship-winning captain Josh Risdon has departed the A-League Men club after five years.

Sydney FC coach Ufuk Talay has revealed the club's star winger Joe Lolley won't play again this season, in a hammer blow for the Sky Blues' title hopes.

Resigned to eventually losing Daniela Galic to an overseas club, Melbourne City hope the teen will play another season as they seek grand final redemption.

Skipper Luke Brattan and English talisman Joe Lolley are under injury clouds heading into Sydney FC's A-League Men semi-final first leg.

Melbourne City have had a roller-coaster season, but Socceroos forward Mathew Leckie is confident they are hitting form at the right time.

Melbourne City have won every A-League grand final they have appeared in. Chasing back-to-back championships, Sydney FC are keen to change that on Saturday.