A 61-year-old man suffered a fractured eye socket and jaw after being attacked as he sat at bus stop.
The attack happened at about 6.30pm on Monday, October 22, when the couple were sitting at the bus stop opposite the Magpie Youth Centre, in HIllsborough Road, Eyres Monsell, Leicester.
They were chatting to a group of about 10 teenagers, who were asking for a cigarette, when they were approached by a man on a bike.
The couple then became involved in an altercation with the man and the victim was assaulted.
His partner was pushed over and has been left with a pain in her hip.
The man rode off along Hillsborough Road.
Detective Constable Kris Howe said: "It's very important that we trace anyone who was in the Hillsborough Road area at the time of the incident.
"The victim received some nasty inquiries, so we need to trace the person responsible. If you witnessed this assault or know the identity of this man, please let us know.''
The man is described as white, in his late 20s to early 30s, about 5ft 8in tall, of a stocky build with a round face.
He was wearing a dark jacket.
Anyone with information is asked to contact Pc Howe by calling Leicestershire Police on 101.
