Perth Glory went a point clear at the top of the A-League following a 1-0 win at Central Coast Mariners.
Nebojsa Marinkovic scored a stunning free kick for the visitors in the 43rd minute at the Central Coast Stadium.
It was Glory's first regular season win at Gosford, consigning Mariners to a third consecutive defeat.
On Saturday, Melbourne Victory had to come from 2-0 down to salvage a 2-2 draw with Newcastle Jets.