A man convicted with his brother over a drunken attack against two men after an AFL final in 2018 has withdrawn his appeal after a County Court judge warned him his sentence might be increased.

Key points: Dominic Walker will serve out his 12-month jail term and then be subjected to a two-year community corrections order

Dominic Walker will serve out his 12-month jail term and then be subjected to a two-year community corrections order Sam Walker's defence lawyer said his client acted in self-defence

Sam Walker's defence lawyer said his client acted in self-defence The court heard Sam Walker had been suicidal before the match and that Dominic Walker was looking out for him

Dominic Walker, 28, is serving a year-long jail term after pleading guilty to two counts of intentionally causing injury in a violent attack on September 7, 2018.

His brother, 26-year-old Sam Walker, is appealing a six-month jail term.

They are the sons of prominent lawyer Tim Walker QC.

They were attending a match between Richmond and Hawthorn at the MCG with friend Benjamin Fitt, who was sentenced to four months in prison.

The two victims — Leonard Tricarico and David Raeside — had also been at the game, dining at the Melbourne Cricket Club before watching the match.

The men were intoxicated, the court heard.

Prosecutor Nicholas Batten told the court Dominic Walker was captured on CCTV footage after the match as he left Gate 2 of the MCG and was observed to be "unsteady on his feet" and "highly intoxicated".

The two groups of men had an initial altercation near a hotel in Wellington Street, East Melbourne.

But the subject of the case against the men involves a later altercation when Mr Tricarico and Mr Raeside saw the Walker brothers in a cab and approached them, hitting the cab door.

Sam Walker's defence lawyer, Dermot Dann, told the court Mr Tricarico and Mr Raeside were acting in a "really violent way" saying his client acted in self-defence.

'You are going to f***ing die'

CCTV footage from the taxi driver was played in court.

It showed graphic footage of Dominic Walker punching and kicking Mr Raeside, who Judge Michael Tinney said was "defenceless".

Dominic Walker was wearing a distinctive black and yellow beanie for his team Richmond.

He stomped on Mr Raeside's head three times, prosecutor Nicholas Batten told the appeal hearing.

Mr Raeside was left unconscious on the road, the court heard.

Sam Walker (left), brother Dominic Walker (centre) and Benjamin Fitt (right) outside court last year. ( AAP: David Crosling/James Ross )

A voice in the video is also heard saying "you are going to f***ing die" and "I'm going to f***ing kill you", Mr Batten said.

Mr Raeside suffered bleeding on the brain and broken bones to his face, the court heard.

Another witness recorded the scene from a vantage point above the street.

In that video, also played to the court, one of the victims said "Stop, stop. We're sorry".

"No matter how many times you watch the video, it's difficult to work out with any precision which blow caused which injury," Dominic Walker's defence lawyer Ashley Halphen told the court.

Judge warns sentence could be increased

The court heard Sam Walker had been suicidal before the match and that Dominic Walker was looking out for him.

His parents provided character statements that said going to the football that day was a bad idea, the court heard.

The court heard Dominic Walker had a promising career in the agriculture sector and had been studying Spanish in order to work in Guatemala.

But part way through the hearing Judge Tinney told defence lawyer Mr Halphen that it was possible Dominic Walker could be given an increased sentence, not a lower one.

Dominic Walker then withdrew his appeal.

Just before he left the dock, he and his brother clasped hands.

Dominic Walker will serve out his 12-month jail term and then be subjected to a community corrections order (CCO) for two years.

Sam Walker is on bail and is yet to serve any of his six-month sentence.

"Sam Walker has suffered a serious injustice in the magistrates' court," defence lawyer Dermot Dann said, arguing that his client should not have to serve a jail term because of a "misapplication of parity considerations" by the magistrate.

Mr Dann argued his client played a lesser role in the attack and was defending himself.

"He himself was assaulted, he himself was taken to the ground," he said.

At issue during the appeal will be what role each of the men played in the assault and the disparity between the men's sentences.

Fitt is expected to be released soon as his four-month jail term is almost over. During the committal proceedings in the Melbourne Magistrates' Court, Fitt apologised to the victims.

All men were ordered to take part in a CCO for two years once their jail time was completed.

The appeal by Sam Walker will continue on Tuesday.