The Premier League has issued fresh directives to fans as the Omicron strand of COVID-19 continues to spread in the UK.
Supporters will now be required to provide COVID status certification as new entry requirements for all stadiums.
Matches involving Tottenham Hotspur and Manchester United have been postponed, while authorities continue to encourage people to get vaccinated.
Fans hoping to attend matches will need to show proof of double vaccination or a negative lateral flow test within 48 hours of kickoff, while clubs are also providing ticket-holders with Covid-19 status self-declaration forms to fill in before games.
Those who are unable to show proof of their status could be denied entry, with clubs due to carry out spot checks at the stadium ahead of their upcoming home matches.
The league has issued a statement warning fans that they “must not attend” if they have “any Covid-type symptoms” or a risk of passing on the illness.
Supporters have also been encouraged to wear face masks while moving through indoor areas within the stadium and when travelling to the game on public transport.
Some transport networks had already implemented their own guidelines before the latest advice was issued.
“We are doing all we can to keep fans safe and grounds open at full capacity,” Premier League chief executive Richard Masters said.
“The safety of everyone remains our priority and since the start of the season we have been working closely with our clubs, Government and local public health authorities to prepare fans and stadium operations for the introduction of COVID certification.
“It is really important fans take the time to understand what is required of them when attending Premier League stadiums, which is why we are asking fans to declare their COVID status ahead of a matchday.
“We want everyone to enjoy matches in safe environments and we and our clubs will continue to urge fans to do all they can and follow public health guidance.”