Police are investigating an assault, that happened on the junction of Frensham Road and Heyshott Road, Southsea, at around 4.15am on Sunday (November 27)
A 20-year-old man was found lying on the ground, suffering from a head injury. He was taken to Queen Alexandra Hospital with serious but not life-threatening injuries and has since been discharged.
A 27-year-old man from Portsmouth was arrested on suspicion of GBH. He has been bailed until Jan 19, 2017.
Anyone with information is asked to contact Hampshire police on 101.