Key legal question
Whether the CAS panel was improperly composed because of alleged bias connected to respondent's counsel
Extracted holding
The bias objection was waived because it was not raised in a procedurally proper and timely manner before the arbitral tribunal.
Extracted reasoning
A party must challenge a suspected arbitrator as soon as it knows or should know the ground. The appellants knew the alleged facts early but failed to assert a valid recusal request before the CAS; raising it only before the Federal Supreme Court was too late.