Wolves manager Nuno Espirito Santo has refused to apologise for his comments over referee Lee Mason's performance following the 2-1 Premier League defeat to Burnley on Monday.
The Football Association has sought observations from Nuno after he said Mason 'does not have the quality to whistle a game in the Premier League' and that he did not want to see the Bolton official again.
Nuno, who said he will speaking to the FA about his comments on December 29, said: 'I should apologise the timing of my comments.
'They were not in the best moment to come across because it could be a bad interpretation.