A brace of absolute blockbusters from both feet earned Adelaide United the 2018 FFA Cup in a 2-1 win over Sydney FC at Coopers Stadium.

Goodwin struck in the first half with a ferocious free kick with his left and then in the second half secured victory with a volley off his right foot.

His heroics won him the Mark Viduka Medal and legend status among Adelaide fans.

"It went better than anything I could have dreamed of," he admitted today, still groggy from just a couple of hours sleep after the club's cup winning celebrations.

"I would have been happy with just winning the trophy! Scoring the two goals in the way that I did, I'm really happy with that.

"Obviously it's something I will remember for the rest of my life. I'm really excited and and just enjoying the moment."

He added: "Growing up as a kid that that the things that you want to win. The biggest things you train so hard for are the moments like last night.

"Lifting the trophy and and sharing it with our fans – who were fantastic last night – was amazing.

"I enjoyed the time with the boys after the game. It's something that doesn't happen often in your career so you really need to enjoy these moments –  and we certainly did that as a team."

Goodwin admitted he was eyeing up the chance to take the free kick when he saw where it was on the field and it matched up with what he had been practising pre-match.

A few metres closer to goal and Goodwin would have watched his skipper Isaias take the kick – but that one was in his perfect danger zone.

"I work on freekicks all the time in training with Isaias," he revealed. "I think we have a good understanding on set pieces.

"Being a bit further out and at distance, I think it suits me a bit more. I'm able to get a bit more power from that range. I like it a bit further out."

As soon as he struck both his shots, he knew they were goal bound.

"They came so sweet off my foot," he said. "It's like a split second before the ball's in the net. I'll hit it and look up and it's just there – it's going in.

"Generally on my left I can hit them pretty sweet but on my right, that's as good as I've hit!

"It's hard to describe the feeling of scoring a goal but to to do it in the Cup final, and obviously, to play an important role is just something I'll remember for the rest of my life."