Chelsea may have to travel to Poland or Romania for the first leg of their Champions League last-16 tie with Atletico Madrid.
LaLiga leaders Atletico are desperate to play the game on home soil, but may be unable to do so due to Spain's tough travel sanctions.
Due to the ongoing pandemic, travel restrictions on those arriving from the UK to the country mean it is not possible for Chelsea to play in the Spanish capital as things stand.
And it appears that those measures will be extended beyond the current window which is up until February 16.