A 57-year-old man was assaulted during an attempted robbery as he was walking his dog in South Oxhey this week.
At around 8.45pm on Tuesday, the victim was walking along the footpath which runs between Highlands and Hayling Road, adjacent to the car park of the pavilion pub, when he was approached by two men.
Hertfordshire Constabulary said one of the men asked the victim for his phone and punched him in the eye when he refused to hand it over.
The criminals then ran off towards Hayling Road.
Police are appealing for witnesses and information.
One man is described as a white male of 5ft 8/9ins tall who was of a slim build. He was wearing a grey hooded top which was tied tight around the face, blue jeans and white trainers.
The second is described as a white man of slim build and around 5ft 6ins tall. He was wearing a dark hooded top, blue jeans and trainers.
Anyone with information about the crime or the two men is asked to contact call the police on 101 quoting crime reference number C3/14/319 or call Crimestoppers anonymously on 0800 555 111.