It's led to another postponement of a top flight fixture.
There have been 36 positive coronavirus tests at Premier League clubs over two rounds of testing in the past week.
Aston Villa's game with Tottenham on Wednesday is the latest top flight fixture to be postponed, following Covid-19 cases at the midlands club.
Spurs will play Fulham instead.
Fulham's scheduled match against Chelsea on Friday will now be played a day later.