Chelsea have been banned from making transfers and giving new contracts to players after the UK government imposed sanctions on the club's owner Roman Abramovich, Apasport reports citing dailystar.
The most immediate impact concerns the sale of the club, with Abramovich's proposed sale now put on hold, and the suspension of match tickets being sold to supporters.
But looking further ahead, the sanctions also mean that Chelsea are unable to make transfers or offer new contracts to their current players in a big blow to manager Thomas Tuchel.
As it stands, defensive trio Antonio Rudiger, Andreas Christensen and Cesar Azpilicueta will all leave the club for free in the summer if the Blues cannot renegotiate their deals.
Christensen has been linked with a move to Barcelona in recent months, while Rudiger, who is one of the world's best centre-halves, has drawn attention from the likes of Real Madrid, PSG and Bayern Munich.
More worryingly for Chelsea is that under the current sanctions, they will not even be able to replace the trio or any other key players who may decide to leave in the summer.
Furthermore, the club are also understood to be unable to hand out new contracts to 17 and 18-year-olds in their academy while the uncertainty remains.