England players threatened to leave the pitch on Monday if they are discriminated against in a match against Bulgaria.
England will visit the Czech Republic on Friday for the 2020 European Championship, and visit Bulgaria on Monday.
The England squad will play Bulgaria without a majority of spectators because of their racist remarks, Bulgaria was sanctioned in June.
On Wednesday, England striker Tammy Abraham said the players were ready to leave the stadium as soon as possible.
Bulgaria fans have been found guilty of racist chants against Kosovo and the Czech Republic in their bid to qualify for the European Championship.
UEFA ordered that 5,000 of the 46,340 seats at the Vasil Levski stadium in Sofia be blocked off for the game with England and 3,000 against the Czech Republic next month.