Nottingham Forest striker Nathan Tyson is set to plead guilty to an FA charge of improper conduct following his actions against Derby County.
The Reds ace celebrated a 3-2 victory for Forest over their arch-rivals last month by carrying a corner flag in front of the away support.
There were home fans in the upper tier of the stand in question, but Tyson's actions were regarded as inflammatory.
An unsightly melee involving players from both sides quickly unfolded, marring what had been a keenly-fought contest between two old adversaries.
Tyson admits his antics on the final whistle were misjudged and is fully prepared to face the consequences.
"I've had a long time to reflect on my actions and I intend to write to the FA and apologise," he told Forest's official website.
"It wasn't the best thing to do and I'm embarrassed about it all.
"I shouldn't have done it. I realise that now and I would like to apologise to anyone who I offended and anyone who may have been hurt.
"I'm a better person than that. I'm a man and I know when I've made mistakes.
"I'll learn from it and definitely won't be doing anything like that again."