Liverpool could be without defender Joel Matip for a further six games because of confusion over availability.
Matip did not want to play for Cameroon after he was named in the preliminary squad for the Africa Cup of Nations.
Matip, who has made 14 appearances for the Reds this season, last played for Cameroon in September 2015.
Fifa says that without Cameroon's permission, Matip, 25, cannot play for the Reds until the end of their participation in the tournament.
Should Cameroon make it to the final on Sunday, 5 February, then Matip would not be available until Liverpool host Tottenham in the Premier League on 11 February.