This looks like two level sides in the early weeks of the A-League season. Sydney have the home tag, but their goal output at home has been modest, and Central Coast keep turning games into one-goal affairs or draws. The most natural result is a narrow one, with a Central Coast goal always live.
Sydney sit fifth and Central Coast tenth, but the underlying numbers are close: similar shots on target, near-equal possession, and expected goals that do not separate them. Sydney scored only nine goals in twenty home games, which is not the output of a side that runs teams over in front of its own crowd.
The main matchup is Sydney's set pieces and wide entries against a Central Coast back line that has been without its Achilles-injured defender and leaks goals away from home. On the other side, Sydney have played several games without their first-choice keeper and two defenders. Those absences are not new, so they are already inside the recent results rather than a fresh surprise, but the replacement keeper remains the real unknown.
I expect a tight first half, with Sydney holding slightly more territory. A first Sydney goal would open the game up; an early Central Coast goal from a set piece or counter makes the draw or an upset very real. Most likely outcomes sit within a single goal.
That is why I'm siding with Central Coast Mariners with a goal of protection: it covers the draw and the upset, and returns the stake if Sydney win in the most natural way, by one goal.