Police are urging party-goers who were in the city centre at the time of the attack to come forward.
Officers today stepped up their hunt for suspect, who attacked a 30-year-old man in Gordon Street at the weekend.
The victim was subjected to a torrent of racist abuse, before being viciously attacked outside the Co-op shop.
He received treatment for facial and shoulder injuries at hospital.
Detectives said the hate-fuelled incident happened near Glasgow Central Station at around 11.50pm on Saturday, while the streets were busy with people enjoying a night out.
Police believe they may have information that will help catch the attacker.
The area would have been busy at the time with people coming and going from pubs and restaurants.
Officers are carrying local inquiries and reviewing CCTV in a bid to catch the culprit.
Detective Constable Tony Brady, who is leading the investigation, appealed for witnesses to come forward.
He said: "Officers have been carrying out inquiries in the local area and studying CCTV in an effort to gather information on the man responsible.
"Gordon Street would have been busy with people on nights out.
"I would urge anyone who witnessed this crime, or has any information that may assist enquiries to contact police."
Police said the suspect is described as white, 6ft, and of stocky build.
At the time of the attack, he was wearing a light coloured top.
Anyone with any information is asked to contact Police Scotland on 101.