This season's Champions League and Europa League final have been postponed because of the coronavirus pandemic.
European football's governing body, Uefa, said "no decision has been taken on rearranged dates" for the finals that were due to take place in May.
The competitions are currently suspended along with almost every European domestic league because of the coronavirus.
Uefa last week postponed the Euro 2020 tournament until next year.
Istanbul was set to host the men's Champions League showpiece on May 30, while the Europa League final was due to take place on May 27 in Gdansk.
The women's Champions League final, scheduled for Vienna on May 24, has also been postponed.
"Uefa has formally taken the decision to postpone the club finals originally scheduled for May 2020," a statement read.
"No decision has yet been made on rearranged dates. The working group, established last week as a result of the conference call among the stakeholders of European football, which was chaired by Uefa president, Aleksander Ceferin, will analyse the options available.
"The group has already begun its examination of the calendar. Announcements will be made in due course."
It is the second postponement Uefa has had to confirm within the last week after Euro 2020 was put back 12 months.
The Champions League was halted halfway through the return legs of the round of 16 with four ties still to be decided.
Some media reports have suggested ties could be reduced to one leg instead of two from the quarter-finals with a "final four" tournament in Istanbul.
In the Europa League, two of the round of 16 first leg matches have still to be played and all of the second legs.