An impressive 10-minute blitz steered Adelaide to a 4-2 win over Central Coast at Coopers Stadium on Sunday.
The Reds were forced to come from behind in front of 10,269 fans at Hindmarsh after the visitors took a surprise lead. But United netted three times in 10 minutes after the half hour to overturn the deficit and take a comfortable 3-1 lead into the break.
Adelaide had dominated early and enjoyed a handful of chances but it was the visitors who broke the deadlock in the 15th minute when Roy O'Donovan latched onto a through ball from Liam Rose.
The Irish striker beat Dylan McGowan and fired past Eugene Galekovic at the near post. But the Reds rallied and found the net three times in 10 minutes.
Isaias was on target first for United with a wicked dipping shot from 30 metres on the half hour before some individual brilliance from Stefan Mauk put the Reds ahead four minutes later.
The young midfielder received the ball from Bruce Djite and weaved his way through four Mariners defenders before picking out the bottom corner of the goal.
Djite then made it 3-1 on 38 minutes after a neat exchange of passes in the penalty area with Goodwin supplying the final assist for the striker to hammer home from 10 metres.
United looked comfortable for much of the second half and were rarely troubled, although Luis Garcia should have done better with his effort from close range.
The Reds then added a fourth when substitute Pablo Sanchez converted a spot kick on 81 minutes after he was brought down in the area.
Central Coast pulled one back two minutes later as O'Donovan grabbed his second with the pick of the afternoon. The striker controlled the ball with his chest before smashing a left-foot volley past Galekovic, leaving the Reds keeper with no chance.