The Eagles were relegated from the Europa League to the Conference League for breaching governing body UEFA's multi-club ownership regulations but are appealing the ruling - which will see Nottingham Forest handed their place in the superior competition - at the Court of Arbitration for Sport (CAS).
Palace's appeal will be held on Friday (08.08.25), with a decision expected next Monday (11.08.25), and Glasner is optimistic that the club's case will be successful.
The manager 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."
Palace's chairman Steve Parish described the club's demotion from the Europa League - which they qualified for by winning the FA Cup last season - as "one of the greatest injustices" in European football history.
He said: "Obviously, we're devastated. 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."
