 On July 11, 2012, it was announced that he had joined Sydney FC on a one year loan deal from Panamanian club Sporting San Miguelito with the option to make the move permanent throughout the season.After a solid first season which yielded 6 goals in 18 games, Sydney FC announced that they would be extending the loan for an additional year.On 7 January 2014, Sydney FC announced that they would be releasing Yau from the remaining months of his loan deal to allow him to undergo treatment for compartment syndrome in his legs.