Adelaide United have piled the pain on A-League strugglers Melbourne Victory, coming from a goal behind to beat their fierce rivals 3-1 and leap into second place on the table.
Adelaide skipper Stefan Mauk scored a brace while impact substitute Kusini Yengi scored one goal and assisted another to deliver the Reds their fourth win on the bounce and dial up the pressure on Victory boss Grant Brebner.
Jake Brimmer's spectacular free kick got Victory off to the perfect start in the 28th minute, before the Reds hit back, then seized control at Marvel Stadium.
Brebner made four changes to the team thumped 6-0 by Melbourne City, while Adelaide goalkeeper James Delianov failed a late fitness test, opening the door for youngster Joe Gauci.
A lively Victory had three big chances to snare the lead in the space of six minutes - with Robbie Kruse scuppering two in the 12th and 16th minutes and Rudy Gestede heading another over the bar in the 17th.
But their moment came when Callum McManaman was brought down outside the area in the 27th minute.
Brimmer's free kick was a thing of beauty - clattering off the crossbar and dropping just over the line.
Victory enjoyed just seven minutes of joy before Adelaide responded in the 35th.
Leigh Broxham failed to clear Javi Lopez's ball into the box, and it fell for Mauk, who ghosted in behind Jacob Butterfield and smashed home the equaliser.
Yengi was brought onto the field in the 56th minute and just two minutes later, he shrugged off Victory defender Aaron Anderson, then hit the post under pressure from Broxham.
On his second attempt, in the 61st minute, Yengi would not be denied.
Lopez released Craig Goodwin and the in-form Socceroos winger squared the ball for a leaping Yengi to tap home.
The 22-year-old took off, leaped over the advertising boards and - casually as you like - celebrated in front of the incensed Victory fans.
In the 67th minute, Broxham received his fifth yellow card of the season for a challenge on Yengi - meaning he'll miss next week's clash with Sydney through suspension - then was inches away from making it 3-1 to Adelaide when he smacked the ball into his defensive crossbar a minute later.
Ten minutes later, Yengi left the Victory defence in his wake and centred the ball for Mauk to power home his second and seal all three points.