Man accused of stabbing real estate agent Vissa Esan to death after an argument told police he 'wanted to cut his head off'

The man accused of fatally stabbing a Sydney real estate agent allegedly told police after the murder that he 'could have done worse' and 'wanted to cut his head off,' a court has heard.

Adam Brewer, 33, pleaded not guilty to murdering father-of-one Vissa Esan, 47, after the pair were involved in an argument at a Pendle Hill real estate agency in March of last year that left Mr Esan with fatal stab wounds to the heart and arms.

CCTV footage, played to the court, showed Brewer approached Mr Esan inside his business 'ready for a fight,' before hitting Mr Esan as he bent over to pick up a broom to defend himself.

 Adam Brewer, 33, pleaded not guilty to murdering father-of-one Vissa Esan, 47, (pictured) after the pair were involved in an argument at a Pendle Hill real estate agency in March of last year

Along with the stab wound to the heart, Mr Esan suffered wounds to his left armpit, elbow and fingers.

Following the altercation, Brewer fled through a nearby laneway, stopped at a nearby business and told witnesses that he had been 'jumped by three blacks at the train station.'

In the police video, seen by the court, Brewer admitted to stabbing Mr Esan in the head and stomach. 

'If there are witnesses they will swear black and blue that he hit me a thousand times before I even sprung a single punch,' Brewer said in the video, The ABC reported.

'I use my fists, you know me. 

Brewer's lawyer, Peter Skinner, told the NSW Supreme Court on Tuesday that self-defence would form the primary basis for their case.

 Brewer's lawyer, Peter Skinner, told the NSW Supreme Court (pictured) on Tuesday that self-defence would form the primary basis for their case

Psychiatric evidence about Brewer's perception of the events leading up to Mr Esan's death and a defence of provocation might also come into play, he said.

Crown prosecutor Michael Barr told the court in his opening remarks on Tuesday that Brewer had intended to cause grievous bodily harm to Mr Esan, who died from a stab wound to the heart. 

Mr Barr says any claim of self-defence ended when Brewer re-entered the arcade. 

The trial before Justice Geroffrey Bellew is continuing.