Ex-Celtic and Dundee United player Mark Wilson told Glasgow Sheriff Court he met his former team mate as he and some friends were making their way for a taxi in Ashton Lane last October.
Mr Wilson - who was in the company of Dundee United midfielder Paul Paton - said Mr Zaluska became aggressive after Paton introduced himself.
He claimed Mr Zaluska said “You are Rangers” to Paton and words to the effect that he was going to phone Northern Irish player Paddy McCourt and tell him that Mr Wilson was “with a h*n”.
Mr Wilson said that after ushering Mr Zaluska out of the lane, Mr Paton pushed or slapped him and he stumbled back onto a taxi.
The witness told the court he then left to get his wife and friends but that a short time he later saw Mr Zaluska lying unconscious and bleeding.
He was the first witness to give evidence at Paton’s trial at the court where he denies assaulting Mr Zaluska on October 20, 2014.
Paton, 28, from Paisley has lodged special defences of self defence and incrimination.
Mr Wilson told the court he had been out with his wife and some other friends in Ashton Lane and later met up with Paton and his friend Chris McCluskey.
He estimated they left the last pub in the lane around 11.40pm on October 19 and it was then he saw Mr Zaluska.
The witness told procurator fiscal depute Stephen Ferguson, that while chatting to him, Paton introduced himself to Mr Zaluska and they shook hands.
He said: “Lukasz shook his hand then continued to look as if he was going to continue his conversation with myself, then turned to Paul and said ‘you are Rangers’, to Paul.
“Paul said ‘No, I play with Mark.’”
Mr Wilson added: “He went on, he wouldn’t let it go. He said ‘You are Rangers, I hate Rangers’. Paul said to me ‘Is this guy joking?’. I remember Paul saying that quite clearly.”
He said Mr Zaluska was “kind of being aggressive” and Mr Wilson stood in between the two men.
The former Celtic player said he asked his wife to stay with Paton and he ushered Mr Zaluska out of the lane to Byres Road.
It was heard that Mr Zaluska turned around and started shouting things up the lane, where Paton was saying he “wanted to kill all Rangers fans”
Mr Wilson said: “He had suggested he was going to phone an Irish friend of mine to say I was hanging out with Paul Paton, a Rangers fan”
It was suggested by defence lawyer Billy Lavelle, the friend was Paddy McCourt and that Mr Zaluska said he was going to tell him that he was “with a h*n”.
The witness said he couldn’t be 100 per cent but it was words to that effect.
The court was told Paton then came down the lane towards the men and said “What are you saying?” and “You can’t be saying things like that in the street.”
Mr Wilson said the shouting continued and Paton told him to stop.
He said Paton reached over his shoulder and hit Mr Zaluska in what he described was a “kind of push, slap” to his face.
The witness said he didn’t know if he caught the kerb but that Mr Zaluska fell into a taxi and at that point he “had enough” and went to get his wife and they went into another lane.
Mr Wilson said he then heard a commotion and saw Mr Zaluska unconscious on the ground and bleeding from the head.
Mr Wilson said he didn’t see where Paton was and that when Mr Zaluska came to, he asked where Paton was.
The trial before sheriff Andrew Normand continues.