Sydney FC maintain their spot atop the A-League ladder following an arduous goalless draw with Brisbane.
Friday night's top-of-the-table blockbuster could have been mistaken for a session of curling, so slow was the affair at Allianz Stadium.
It also offered little indication unbeaten Sydney are finally going to make life tough for travelling teams, with the hosts giving the ball up over and over to a largely untroubled Roar defence.
Shane Smeltz provided one of the first half's only shots on goal when the Sydney striker spun the ball towards the far post, only for in-form Brisbane goalkeeper Jamie Young to dive to his right and paw it to safety.
The usually high-playing Sebastian Ryall and Rhyan Grant sat deep, imprisoned on the flanks by Thomas Broich and the A-League's lead scorer Brandon Borrello.
Frustrated manager Graham Arnold gave them a serve from the dugout, bellowing for his flat-footed team to "go forward".
But Brisbane had them in a spin, playing directly through the hosts' static midfield, as John Aloisi's side have done so efficiently this season.
In their own half the Roar ran the show, their back four rarely troubled as Sky Blues captain Alex Brosque, who embroiled himself in a number of stoushes, constantly drifted backwards.
Skilful midfielder Corona was a picture of control while youngster Jamie Maclaren was dangerous up front.
Quiet during the first half hour, Maclaren darted nimbly, out-manoeuvring Sydney defender Jacques Faty but unable to squeeze a chip shot in from the edge of the box.
Sydney began to breathe towards the end of the first half and showed flickering promise.
There were more signs of life after the break when Slovak Filip Holosko escaped on a blistering run from the centre circle, only for his receiver Smeltz to weaken in the finish.
Jean Carlos Solorzano came off late in the second half with an apparent hamstring issue, following Milos Ninkovic's earlier exit with his own leg problem.
Ninkovic's replacement Andrew Hoole was soon joined by the brawny Matt Simon, whom Arnold finally brought on for Smeltz with 15 minutes to go.
Simon went in charging as the game opened up and both sides ran end to end but neither could break the deadlock.