Crystal Palace have said "sporting merit is rendered meaningless" after losing their appeal against demotion from the Europa League to the Conference League.
After winning the FA Cup last season, Palace qualified for Europe's secondary competition but were punished by Uefa for breaching multi-club ownership rules.
The Court of Arbitration for Sport (Cas) sided with Europe's governing body on Monday.
In a strongly worded statement, Palace said it was " almost impossible to receive a fair hearing."
"The decision by Uefa and followed by the Court of Arbitration for Sport shows that sporting merit is rendered meaningless," Palace said.