A-League leaders Sydney FC have extended their unbeaten streak against Adelaide to 11 matches with a 2-1 win at Jubilee Stadium.
The ink is still drying on his new contract, and Sydney FC midfielder Paulo Retre swiftly justified his extension with a brace against Adelaide United on Saturday night.
Retre signed a two-year deal on Thursday, and two days later he scored his first goals of the A-League season in a 2-1 victory over the Reds at Jubilee Stadium.
"Fantastic, I thought he was," coach Steve Corica said of the versatile 26-year-old.
"Coming up with two goals is outstanding. He's really enjoying playing as a six and having a good run at six. That's his position, that's where he wants to play.
"He's filled in for us many times at right back and as a No.10 as well but you can see his quality and obviously his finishes were very good today, and very important for us."
The first came in the 20th minute when Alex Baumjohann whipped in a corner to Kosta Barbarouses, whose shot was blocked by Reds keeper Paul Izzo.
Retre was on the spot for the rebound to give the Sky Blues the lead.
Just seven minutes later he scored one of the goals of the season, rounding off brilliant lead-up work by Baumjohann and Barbarouses.
It was another tough night in sweltering conditions for Adelaide, who have not defeated Sydney FC in their last 11 meetings.
Drinks breaks were required, and at 9pm the mercury was still high at 34C.
The crowd of 10,219 sweated through the action until a late southerly cooled the atmosphere, though the breeze also brought bushfire smoke with it.
"They were tough conditions, hot conditions, very humid as well but we're footballers and they have to go through it," Corica said.
"They had the drinks break, I think we followed protocol and we did everything right. We put on a good performance in the conditions, both teams."
Earlier, Adelaide midfielder Riley McGree tapped in a goal in the 38th minute when he finished off a free kick from James Troisi.
The Reds could have scored in the fifth minute when George Blackwood headed in a goal, but it was ruled out due to a foul in the lead-up.
A late miss from Jordan Elsey from in front of the goals also left Adelaide ruing missed opportunities.
There was another moment of controversy early in the second half when an apparent handball from Adelaide's Michael Maria in Sydney's box went unpunished.
While the win extends Sydney's undefeated streak over Adelaide, it also puts them nine points clear of Melbourne City at the top of the ladder.
For Adelaide, the loss leaves them just one point ahead of the Western Sydney Wanderers in sixth.
Next week they will play Perth Glory at HBF Park, while the Sky Blues will face the Newcastle Jets at McDonald Jones Stadium.