The incident came after Slater argued with his girlfriend, 18, on December 17 and she packed her belongings.

As she was leaving the unit, Slater pushed her down stairs and the woman contacted her former boyfriend by phone to tell him what happened.

The man later became involved in a scuffle with Slater, who inflicted four wounds to the other man and one to himself which required stitches.

The circumstances of the clash were outlined in facts tendered in the District Court at Albury where Slater appeared in custody for arraignment.

He pleaded not guilty to wounding with intent to cause grievous bodily harm, but guilty to reckless wounding.

Slater, 19, remains in custody with his sentencing adjourned to the District Court sittings starting on February 17 for the preparation of a pre-sentence report.

The woman’s former boyfriend had enlisted support from two other men to accompany him to Slater’s unit after she had contacted him.

They yelled out: “We’re going to get you, you woman basher.”

“Come out the front. You’re dead. If you don’t come down, we’re going to kick in your door.”

When there was no response, the three men left and Slater rang triple-0 to complain about two men threatening him.

The woman received a text from Slater and her former boyfriend went back to the unit accompanied by another man.

Slater emerged with a knife and was hit in the head by a mobile phone thrown by the former partner.

There was a scuffle with punches thrown and the victim was struck to the neck and three times in the back with the knife.

The wounds were between two and four centimetres in size and required stitching at the Albury Base Hospital.

Slater went back inside and rang triple-0 telling the operator he had been stabbed in the arm and stabbed another man in the back.

The man who witnessed the fight told police Slater had stabbed himself when he swung at the victim.

Slater needed two stitches to his wound and claimed to police that he acted in self-defence.