Pep Guardiola fears an unwanted returned to empty stadiums if the general public don't follow rules on vaccinations and mask-wearing.
Guardiola is adamant he wouldn't like to play games without crowds again but admits he is bemused by the number of people he sees without masks compared to his native Spain.
He thinks it represents a risk to the way football will look in 2022 because cases might continue to rise unless the population alters their habits.
'I would not love closed doors again. You cannot imagine how different it is playing without people.