A doorman at city centre nightclub Baa Bar was left with a broken eye socket and fractured cheek bone after being attacked by thugs he had refused to let in.
The victim also suffered nerve damage after the sickening attack outside the popular Fleet Street venue in Liverpool city centre.
Today Merseyside Police released CCTV images of two men they believe may have information into what they termed a "vicious attack".
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Police said the shameful violence erupted when when the doorman denied entry to two men as the bar was due to close for the night.
The attack happened at around 2.45am on Tuesday, May 25.
A Merseyside Police spokesperson said: "One of the men punched the victim in the face, causing a broken eye socket, fractured cheek bone and nerve damage.
Witnesses are being asked to come forward.
Detective Constable Sam Jennings said: "This was a vicious assault on the doorman who was simply doing his job.
"Nobody should be subjected to this level of violence when they are just trying to earn a living and the victim has required surgery and ongoing treatment.
“I’d appeal to anyone who may have witnessed any part of this incident or know who was responsible to contact police.
“Likewise, if you recognise the men pictured, please get in touch as we believe they may have information that could prove to be a vital part of our enquires."
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Anyone with information is asked to contact Merseyside Police social media desk via Twitter @MerPolCC or Facebook Merseyside Police CC quoting incident reference 21000346243.
You can also call 101 or contact the independent charity Crimestoppers anonymously on 0800 555 111 or via their online form at: https://crimestoppers-uk.org/give-information/give-information.
