The 21-year-old victim was kicked and punched outside a bar in Warwick Road on February 9.
It took place in the early hours of the morning, West Midlands Police said.
Now police have released images of five women they want to speak to in connection with the attack.
Anyone with information is asked to contact the force via live chat at west-midlands.police.uk or by quoting 20BE/35890T/20.
Alternatively, contact Crimestoppers anonymously on 0800 555111 or at crimestoppers-uk.org