Three men entered a Cotmanhay home and beat up the occupant with weapons including a bat, police have said.
The 23-year-old was treated at Royal Derby Hospital for facial injuries after the attack in Monsall Avenue shortly before 6pm on Saturday (June 29).
Officers investigating the assault appealing for anyone who saw three men acting suspiciously in the area to come forward.
A 32-year-old man and a 16-year-old boy have been arrested on suspicion of assault, questioned and released on bail pending further inquiries.
Anyone with information, or anyone who saw three men carrying weapons in the area that night, should call police on 101 or Crimestoppers on 0800 555 111.