UEFA, aware of Jose Mourinho’s security concerns on his return to Porto, have given the Chelsea manager permission to miss press conferences to promote the match.

Normally a manager woould be dined £5,000 for not attending, but Uefa has authorised the assistant manager Steve Clarke to carry out Mourinho’s media duties.

A member of the Super Dragoes supporters’ group issued death threats to Mourinho this year and the same fan spat at the former Porto manager during their visit to Chelsea in September.