UEFA has warned that Chelsea may have to leave unvaccinated players at home when they travel to France to face Lille in the last 16 of the Champions League next month.
The Blues are due to play Lille at Stamford Bridge on February 22 with the return tie against the French champions taking place in northern France on March 16.
However, France is tightening its Covid rules insisting that all professional athletes competing in the country are vaccinated against the virus, or have recently recovered from an infection.
UEFA has now said ‘in principle’, it expects teams to comply with local laws around Covid.