Suspended Queensland co-captain Chad Gibson has his sights set on redemption after taking full responsibility for the Roar's costly last round defeat.

Gibson's 20th minute red card for a tackle on midfielder Terry McFlynn opened the floodgates for Sydney as it ran out 3-0 winners to banish Queensland to second-last on the A-League ladder.

The Roar defender said he "put my hand up" for the loss but believed he could bounce back and play a major role in Queensland's finals tilt.

The suspension could not have come at a worse time for Gibson.

Besides Queensland's finals hopes being up in the air, Gibson is also off contract at the end of the season and desperate to impress new coach Frank Farina.

He will learn on Wednesday from the A-League disciplinary committee whether his challenge has earned a two match ban.

But Gibson will definitely miss Queensland's must-win clash against Perth at Suncorp Stadium on Saturday night.

Gibson fell out of favour with former coach Miron Bleiberg but received another shot at cementing a starting berth under new mentor Farina.

He said he let his new-found excitement get the better of him against Sydney.

"Frank has been a breath of fresh air, but we've cost ourselves with silly mistakes - I put my hand up for what I did in Sydney," he said.

"I take full responsibility. I let Frank down and I let the squad down - that's the most disappointing thing.

"I just let my emotions get the better of me. It's going to be even harder watching from the sidelines.

"I want to be part of this battle and help the club get into the finals."

Gibson was disappointed with his challenge but believed he was harshly dealt with by referee Ben Williams after an earlier Sydney tackle on Roar teammate Spase Dilevski was "10 times worse".

"There was a challenge on Spase beforehand that I was right next to that I thought was 10 times worse," he said.

"I was just so pumped up for the game and I probably let that get the better of me, I wanted to win every ball.

"As I went into the challenge I thought I could win it (ball) and when I realised I wouldn't I pulled my leg back."

Gibson said a short chat with Farina cleared the air over the incident.

"He pulled me in. He didn't have to say too much. I know I messed up," he said.

"There's a huge belief that Frank has instilled, that we are going to get out of this situation together - to not be part of that (this weekend) is difficult."

Gibson is one of seven off-contract Roar players.

"It's in the back of all our minds. I am off contract and I definitely want to end my career at the Roar," he said.

"But you can't let it mess with your head, it can hamper your performance.

"The main thing on my mind is playing for the finals and playing for the team."

Meanwhile, key striker Simon Lynch - who missed the last two games with a thigh strain - trained with the squad and was hopeful of returning against Perth.

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