The European Football Association (EUFA) is to experiment crowd attendance at football matches in European continental competitions with an allowance of only 20,000 fans when the Uefa Super Cup is played in Budapest on Thursday, 24th September.
European champions Bayern Munich will face Europa League winners Sevilla at the 68,000-seater Puskas Arena.
Uefa said "up to 30% of the capacity of the stadium" would be allowed.
A statement said it is "in order to study precisely the impact of fans on the Uefa Return to Play Protocol".
It added: "The Uefa administration will keep monitoring the situation and advise the executive committee if any change is required or recommended in respect of either the 2020 Uefa Super Cup and/or the decision that Uefa matches shall be played behind closed doors until further notice."
Football matches were locked down for three months and on resumption all matches were played in arenas without fans so as not to spread the dreaded Covid-19 pandemic.