Crystal Palace believe they have a very strong case when they appeal against UEFA’s decision to demote them from the Europa League at the Court of Arbitration for Sport (CAS) on Friday.
Palace chairman Steve Parish arrived in Lausanne on Thursday and is confident of victory.
UEFA demoted Palace from the Europa League to the Conference League for breaking multi-club ownership rules.
Their place in the Europa League was given to their Premier League rivals Nottingham Forest, who were previously set for the Conference League.
Palace see the hearing in Switzerland as their only shot at overturning what they believe is a completely unfair decision.
Parish and Palace spent the early part of the summer working closely with UEFA in order to keep their Europa League place, but their lawyers are expected to take a much more robust and less conciliatory approach in the day-long hearing in Lausanne.
They will argue that Palace have been singled out for unfair treatment and that UEFA treats clubs differently - depending on their wealth and influence - when it comes to applying its rules.
The CAS appeal will be heard on Friday, with a decision expected on Monday - a day after FA Cup holders Palace face Premier League champions Liverpool in the Community Shield at Wembley.
Parish and a high-powered team of executives and senior lawyers will present Palace's case at the hearing.
Parish described UEFA's decision to demote Palace to the Conference League for allegedly breaking multi-club ownership rules as "one of the greatest injustices in the history of European football".
Palace want their place back and believe it should happen at the expense of either Forest or Lyon, who will play in the Europa League after winning an appeal against their relegation from Ligue 1.
Palace missed the March 1 deadline to change their ownership structure to comply with the rules. However, the Eagles have legal documents, seen by Sky Sports News, which advise clubs that the real deadline is not March 1, but April 30.
What are are Palace expected to argue?
In the hearing on Friday, Palace will argue:
Glasner 'confident' Eagles will win appeal
This new evidence has raised Palace's hopes of a successful appeal, and, three days before the hearing, Glasner was upbeat about their chances of playing in the Europa League.
He told Sky Sports News: "We don’t have any influence on the decision from UEFA, we don’t have any influence on the decision from CAS, so it just makes no sense that we're thinking about it.
"We focus on what we have to do on the pitch, how to create this spirit in the group, this togetherness, this commitment, and this is what we are doing day by day.
"We’re waiting for the final decision, we’re still confident that the appeal will be successful and that we will play in the Europa League.
"But in the end, on August 11, we will know the final decision – then we will start to prepare for Europe."
Playing in the third-tier Conference League instead of the second-tier Europa League could cost Palace as much as £20 million in lost revenue.
If they did lose the appeal, it would then make it more difficult to hold onto players such as Eberechi Eze, Marc Guehi and Jean-Philippe Mateta.
They would also have to play Fredrikstad or Midtjylland in a two-legged Conference League playoff later this month.
'Devastated' Parish slams UEFA ruling
Last month, Palace chairman Steve Parish said the club's demotion from the Europa League to the Conference League was "one of the greatest injustices" in the history of European football.
Parish strongly rejected the idea Palace and Lyon were part of a multi-club ownership group and said it was a "crazy rule" Palace had been judged to have fallen foul of.
"Obviously, we're devastated," he told Sky Sports News in an exclusive interview. "We're devastated for, most importantly, the supporters. I think the supporters of all clubs should be devastated for us because this is the dream.
"You win a cup, actually win something for the first time in your history. Somebody said to me it's like winning the lottery, going to the counter and you don't get the prize.
"I'm devastated for the players, for the fans, for the staff. It's a bad day for football.
"I think most right-minded football fans will see what a terrible injustice this is for the football club, one that I dearly hope somebody can remedy because I do believe that nobody in football wants to see this.
"I don't think UEFA want to see this. Clubs that rightfully qualify for a competition being locked out of that competition on the most ridiculous technicality that you could imagine.
"Obviously, as everybody knows, John or anybody at Eagle Football [Textor's company] didn't have decisive influence over Crystal Palace. Everybody knows this. Everybody knows we're not part of a multi-club [ownership]. Everybody knows we have no staff, no players from Lyon, no loans, no transactions.
"We've caught a tripwire. We're caught up in a rule that wasn't put there for us.
"It will change. Nobody's going to stick with this rule. It's a crazy rule. I don't understand why the panel have come to the conclusion they've come to.
"We've proved to them beyond all reasonable doubt that John didn't have decisive influence over anything to do with the football club, yet still they've come up with this decision, which seems incongruous."
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