Former Socceroos captain Craig Moore has urged Matt McKay not to lose heart despite making only three appearances so far in his debut season at Rangers.
McKay signed with the Scottish giants in August but has been unable to earn regular selection at Ibrox.
The midfielder, who turns 29 this week, has become a regular fixture for Australia over the past 12 months.
However he is desperate to establish himself at club level and maintain career momentum after picking up the Footballer of the Year and Professional Footballers Australia Player of the Year awards in October.
The Roar have ruled out trying to lure the midfielder back to the A-League but Moore said there would be speculation surrounding McKay's future until he established himself at Rangers.
"For me, he is a fantastic player," Moore told BBC Scotland.
"He is a box-to-box player, left of the midfield, not a wide left.
"He has not had too many opportunities, which is a shame.
"But he is a determined wee fella and he's in there and he's trying his heart out and he'll continue to do so.
"He's desperate to work his way into that team."
McKay's most recent appearance for Rangers was a 0-0 draw at home against St Johnstone on November 19 when he was replaced in the 63rd minute.
Moore enjoyed two stints at the Scottish heavyweights and advised McKay to sign with Rangers.
"The whole reason to come over to Europe was to strengthen his case for maintaining a position in the starting XI for the national team and also to go to the World Cup," Moore said.