Melbourne Victory have suffered their second 5-0 mauling in a week, falling victim to a rampant Sydney FC in their marquee Australia Day match.
The Sky Blues dominated from the outset at Etihad Stadium on Sunday as goals to Ranko Despotovic, Alessandro Del Piero and Sebastian Ryall in the opening half-hour killed the contest.
Del Piero added a second after the break before substitute Nick Carle put the Victory debut of Tom Rogic firmly in the shade of Sydney's stunning performance.
The thrashing was encapsulated by Ryall's impressive Lionel Messi impersonation on 25 minutes.
Taking possession on the right flank, Ryall cut in, carving a route past four Victory players before curling a finish with the outside of his boot around Adrian Leijer and past goalkeeper Nathan Coe.
Sky Blues coach Frank Farina's look of incredulity - five games into a winless streak that had Sydney FC sitting seventh on the ladder - was matched by Victory's captain Leigh Broxham at halftime.
Broxham, fulfilling interview commitments on his way to the dressing room, could only find the words "I don't know" when asked how Victory might turn it around.
Ryall's star turn came well after Sydney had seized control of the game.
After two chances in the opening sixty seconds were lost, Sydney took the lead through Despotovic on 10 minutes.
A Terry McFlynn long ball over Victory's defence to Despotovic's advantage allowed the Serbian striker to outmuscle Nick Ansell and finish strongly past Coe at full stretch.
While Victory were playing as if weighed down by one too many sausages at an Australia Day barbecue, Sydney looked fluent in possession, adding a second from the penalty spot.
Adrian Leijer was harshly adjudged to have brought down Despotovic and Del Piero sent Coe the wrong way from the resulting spot kick.
After Ryall's third, Victory coach Kevin Muscat's afternoon got worse two minutes later when Leijer was knocked out cold when Milos Dimitrijevic's shot caught him square on the jaw. The former captain was stretchered off.
Rogic's introduction at halftime did provide cause for positivity from Victory's fans but Del Piero struck again on 54 minutes, capitalising on a woeful Coe goal-kick.
Victory's Socceroo signing Rogic did test Vedran Janjetovic twice but was unable to rouse an unlikely comeback.
Carle capped off Sydney's fantastic day by dispossessing Scott Galloway and finishing well.
And then, Western Sydney have quashed any talk of a form slump with a dominant 3-1 win over Perth at Pirtek Stadium.
First-half strikes from Brendon Santalab and Aaron Mooy put the Wanderers ahead before Shane Smeltz gave the Glory hope with a goal 10 minutes after the break.
Mark Bridge sealed victory with a 71st-minute penalty to lift the Wanderers back into second spot and ensure the Glory remain winless against the reigning premiers.
Perth have been looking a more confident unit under new boss Kenny Lowe, holding top-placed Brisbane to a 0-0 draw last week.
But they faced a sterner test in the Wanderers, who were desperate to rebound from their first back-to-back defeats this season.
The Wanderers came out looking to score from the opening whistle with Glory goalkeeper Danny Vukovic doing well to diffuse a barrage of strikes throughout.
Bridge, skipper Michael Beauchamp and Youssouf Hersi all put Vukovic to work in an intense opening 10 minutes.
Shinji Ono showed his class, combining with Hersi to create another chance for the Wanderers midway through the half, the Japanese star playing a cheeky back-heel to Hersi who forced another save from Vukovic.
With the Wanderers' assault not letting up, they were bound to find the back of the net soon and it was Santalab who broke the deadlock in the 29th minute.
Mooy and Matthew Spiranovic began the play, combining to dispossess the Glory near the halfway mark.
Spiranovic went on a menacing run towards goal, off-loading to Bridge with Santalab making no mistake off the pass to score his fourth of the season.
Dead-ball specialist Mooy made it 2-0 in the 35th minute when he stepped up for a free-kick, his curling strike deflecting off the Glory wall and dipping just at the right time to find the back of the net.
Wanderers keeper Ante Covic, while barely troubled, met his match in Smeltz - the Kiwi striker finding himself in an eternity of space to get one back for the Glory in the 56th minute.
But just as Glory had the momentum they conceded a penalty when defender Riley Woodcock brought down Shannon Cole in the box.
Bridge stepped up to the mark and made no mistake.