Panathinaikos skipper Fotis Ioannidis has promised to overturn Rangers' first leg Champions League advantage in Athens next week.
Russell Martin's side will carry a two-goal lead to Greece after Panathinaikos wilted at Ibrox and were reduced to ten men.
However, the club's captain, Ionnadis, has vowed to gain revenge against Rangers.
The Greek international striker said: "Nothing is over. We and all the players really feel that we can win and turn the result around.
"We know we can do it.
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"It was a difficult night because we all thought we had the players to win it ahead of the match.
"We had chances and one moment from Rangers changed everything.
"It is very important for us that the fans support us and stay patient.
"They can be our 12th man and we know they can act as the push we need to win on the night and then go on to qualify."
And teammate Anastasios Bakasetas - the captain of Greece - moaned that the result was 'unfair.'
He pointed out: "I think it's clear that the result was unfair to us.
"I think that if any team should have won, it was us.
"But it's also a law of football, when you don't score a goal, you have to accept it. And we had very clear opportunities to score.
"But there's no point complaining now. We still have one game to rectify this."We all believe we can still qualify."
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