Police are appealing for witnesses after a man was forced to the ground and had his head kicked repeatedly during a late night assault in Belper.
The victim - who had tried to intervene in an argument his girlfriend was involved in outside the Nags Head on High Pavement - received cuts and a bruised eye.
His partner also received minor injuries.
The incident took place on June 2 at around 11.50pm.
The attacker is described as being 6ft 1ins tall with blonde hair and was wearing jeans and a black t-shirt.
Anyone with information should phone Derbyshire Police on 101.