Crystal Palace chairman Steve Parish says the decision to remove Crystal Palace from the Europa League next season is "the biggest injustice in the history of football".
The Eagles were ordered on Friday to compete in the Conference League by Uefa for breaching multi-club ownership rules.
American businessman John Textor owns a stake in Palace and is also the majority owner of French club Lyon, who have also qualified for the Europa League.
"We're devastated," Parish told Sky Sports. "It's a bad day for football. It's a terrible injustice. I do believe nobody want to see this.