Barcelona are due to play Napoli at the Camp Nou on August 8 in the second leg of their last-16 Champions League tie.
However, there are a few concerns about the match currently as Catalonia is suffering from a spike in coronavirus cases and has reintroduced lockdown measures in some areas.
UEFA board member Evelina Christillin has said Europe’s governing body do have a plan in place if the game does have to be moved.
“Guimaraes and Oporto have been prepared as Plan B for some time, and are options for other difficult situations too.