Aston Villa's FA Cup third-round tie with Liverpool is in doubt after Villa experienced a "significant" coronavirus outbreak at the club.
The club's training ground was closed on Thursday after a second round of testing produced more positive results.
Should the match take place, Liverpool will again be without midfielder Naby Keita.
Defenders Virgil van Dijk and Joe Gomez are expected to miss the rest of the season.
Saturday's FA Cup third-round tie between Southampton and Shrewsbury is off after a significant number of Shrews players and staff tested positive for coronavirus.
Non-league Marine's game at home to Premier League leaders Tottenham on Sunday 10 January will be one of three FA Cup third-round ties shown live on BBC One.