Socceroos coach Ange Postecoglou has made the shock decision to drop Aaron Mooy from the starting lineup for Australia's World Cup Qualifier against Syria on Tuesday night.

The only outfield player playing regularly in the English Premier League will start from the bench as part of a tactical reshuffle from Postecoglou.

Tactical shift: Aaron Mooy has been moved to the bench. Credit:AAP

It's understood the Huddersfield Town midfielder had a very brief conversation with Postecoglou immediately after training on Monday where he was told that he was not in the starting team.

He will likely be replaced by Massimo Luongo or Jackson Irvine as one of the holding midfielders alongside captain Mark Milligan.