Franck Ribery will learn by 18th May if he will be cleared to play in Bayern Munich's UEFA Champions League final clash against Inter Milan.
The France international is currently suspended for the 22nd May showdown in Madrid after receiving a three-match ban for his red card in the first leg of the semi-final against Lyon.
Ribery had been dismissed for a challenge on Lisandro Lopez and saw an appeal against the length of his ban rejected by Uefa last week.
Bayern have now taken the case to the Court of Arbitration for Sport, who expect to reach a decision on the winger's availability four days before the final.
"The CAS will establish a procedural calendar very quickly after consultation with the representatives of all parties," said the sport's highest tribunal in a statement on Monday.
"CAS should be in a position to issue a final decision on 18th May."
Bayern chairman Karl-Heinz Rummenigge remains optimistic that the CAS will find in the club's favour and allow Ribery to line up against Inter in the Santiago Bernabeu.
Rummenigge told TV show Doppelpass: "Up to the last moment we will try to get a ruling that allows Franck Ribery to play in the final.
"We now have a 50/50 chance. With Uefa's jurisdiction you always have a bit of a feeling that it's not so much a legal decision as a political one. At the international Court of Arbitration for Sport it's different - politics plays no role there.
"That's why I'm still reasonably optimistic that we still have a chance."