Oxford striker Dave Kitson is to plead guilty to a Football Association misconduct charge but has also asked for a personal hearing.
The charge is in relation to post-match comments made after the 1-0 loss against Bristol Rovers on 2 November.
Kitson, 33, called referee Mark Brown "horrific" and "horrendous" and also accused him of swearing at injured U's midfielder Alfie Potter.
He had been given until 18:00 GMT on 14 November to answer the charge.
Former Reading, Stoke and Sheffield United striker Kitson also called Brown "possibly the worst referee" he had come across in his 13-year career.
Brown awarded Rovers a penalty, while Potter also suffered a serious ankle injury in the League Two match.
Kitson is specifically charged with post-match comments which constitute improper conduct in that they called into question the integrity of a match official and/or implied the match referee was motivated by bias and/or were personal in nature and brought the game into disrepute.