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A man who "hunted down" another man in Sydney's CBD before punching him unconscious in a "cowardly" attack has been given an 18-month suspended sentence.
Matthew Blackmore, 33, was walking along George Street about midnight on July 14 last year when Abdullah Sinno began chasing him.
Sinno, 35, struck Mr Blackmore once in the head, knocking him unconscious.
Mr Blackmore spent the following 12 days in hospital and now suffers from post-traumatic stress disorder and persistent headaches.
In sentencing Sinno for one count of assault occasioning actual bodily harm on Tuesday, Magistrate Katherine Thompson said it was a "cowardly" attack, with Sinno fleeing the scene and leaving Mr Blackmore lying unconscious.
She said Sinno had thought through his actions enough to stop driving, pull over his car and chase Mr Blackmore.
Sinno's lawyer Peter Webb told the court his client only pursued Mr Blackmore because the 33-year-old had damaged his car.
But prosecutor Sergeant Jade Francis said there was no evidence Mr Blackmore did any such thing.
"What is particularly concerning about this matter is that the victim is essentially hunted down by the offender," Sgt Francis said.
Sinno delivered the single punch with such force it knocked Mr Blackmore "out cold".
"(He) sees him lying on the ground and walks away."
While Magistrate Thompson acknowledged the attack had caused Mr Blackmore substantial ongoing harm, she said Sinno had no history of violence and had good prospects of rehabilitation.
She sentenced him to a term of 18 months, suspended on the basis of good behaviour.
Speaking outside court, Mr Blackmore's sister Jennifer Blackmore said a custodial sentence would have been more appropriate.
Her brother is facing his recovery "day by day", she told reporters.