Violent incidents in the crowd have marred the Fremantle-Hawthorn preliminary final at Subiaco Oval, including a drunk Dockers fan who struck a woman in a nearby seat.

A Dockers fan has pleaded guilty to hitting a woman in the throat after being asked to tone down his language during an AFL match.

Cody Luke Yarran, 24, struck the mother in front of her children during Fremantle’s preliminary final loss to Hawthorn at Domain Stadium on September 25.

He appeared in Perth Magistrates Court on Monday and formally entered pleas of guilty to five charges, including assault and disorderly behaviour.

Video footage of the incident went viral on social media, and showed others rushing to restrain Yarran after he was confronted by the 38-year-old victim.

Chief Magistrate Steven Heath ordered a pre-sentence report and renewed Yarran’s bail ahead of his sentencing on November 30.

Yarran declined to comment when he left court.