The incident took place on Broad Street in the early hours of March 27.
West Midlands Police has issued a picture of a man it wants to speak to following the assault and asked those who recognise him to get in touch.
Police want to speak to this man after an assault on Broad Street, Birmingham. Photo: West Midlands Police
A force spokesperson said: “One man’s been arrested following a thorough investigation – and we’re now asking for your help in identifying the man pictured.
“If you recognise him, or have any information that could help the investigation, call us on 101 quoting 20/188437/25.”