Police are hunting a pair who pounced from a car and left a 37-year-old with cuts and a fractured eye socket.
The victim was walking home, along Hill Street in Brackley, when the duo jumped out of a Citroen Picasso and attacked him.
It happened around 1.15am on Sunday, February 8 and the man had to be taken to hospital for treatment.
The pair were both white and taller than 5 ft 7 in. One of them was wearing a light-coloured jacket.
Anyone with information should call 101 or Crimestoppers anonymously on 0800 555111.