A man suffered a broken cheekbone and eye socket when he was assaulted outside a bar.
The 22-year-old was attacked near Mojo on Corporation Street, Chesterfield, between midnight and 2am on Saturday, January 25.
He told police he was approached by a man who knocked over his drink in a smoking area outside the bar and he was then punched and kicked.
The victim underwent surgery before reporting the attack to Derbyshire Police.
Witnesses or anyone with information should call Chesterfield CID on 101.