Chelsea are holding up Jose Mourinho's appointment at Manchester United.
The Sun says Chelsea still own the rights to his name.
And while Mourinho has agreed a move to Old Trafford, the official announcement has been delayed by legal wrangling.
The European Union Intellectual Property Office database shows the name "Jose Mourinho" is the intellectual property of Chelsea Football Club Limited.
Mourinho has no problem with the personal terms put up by Old Trafford chiefs - but it is believed terms of his image rights are still to be thrashed out.