However, as the judge-only trial was about to start Locke pleaded guilty to a lesser charge of injuring with reckless disregard. Wounding with reckless disregard carries a maximum prison term of seven years; injuring a maximum of five.
Locke, who now lives in Warkworth, was remanded on bail until his sentencing date of April 5.
The victim, Derek Tanner, a father of four young children, said he was still suffering the after-effects of the assault and had been unable to return to work.
He was pleased Locke had pleaded guilty, even though it was a reduced charge, because it spared him going through a trial and reliving the assault.
''I think he had no choice. He knew what he'd done, he knew the evidence was stacked against him.''
Mr Tanner suffered a brain bleed as a result of the punch, one eyesocket is held together with titanium mesh and screws hold his cheekbones in place.