Next month's Super Cup has been put forward to be used as a pilot event to allow spectators into the stadium, UEFA has announced.
The 2020-21 curtain raiser, when the winners of the Champions League and Europa League will meet, is set to take place at the Puskás Aréna in Budapest on 24 September.
The governing body has said that Nations League matches earlier that month will be behind closed doors, but a reduced number of fans could be allowed into the Super Cup.
UEFA said in a statement: "UEFA mentioned that it would be too early to already allow fans into the upcoming UEFA national team competitions matches to be played at the beginning of September and that test match(es) should take place to study precisely the impact of spectators on current medical protocols.
"UEFA suggested to use the UEFA Super Cup, which will be played on 24 September in Budapest, as a pilot match for which a reduced number of spectators could be allowed in."
Member associations have also been encouraged to speak to their respective governments to seek quarantine exemptions if they are travelling to a high-risk country while members can also ask to play games at a neutral venues if local conditions risk a postponement.