Chelsea will be forced to play the second leg of their Champions League tie in Lille without unvaccinated players after UEFA confirmed the French side would not have to move the clash to a neutral venue.
Strict COVID-19 measures have been put in place in France as they look to control the spread of the virus, which include not allowing entry to anyone not fully vaccinated.
In France, fully vaccinated only includes those who have had a third booster jab within the past nine months.