A shopkeeper needed surgery after being attacked in broad daylight outside his convenience store.
Father-of-two Muhammad Rizwan, aged 44, who has run Supershop News on Handsworth Road for 13 years with wife Nabeela, was attacked from behind and his right cheekbone fractured in three places.
The thugs fled without stealing any valuables or shop takings.
Shortly before being assaulted, Mr Rizwan had been involved in an argument with a man who is banned from the shop.
He said: “He is a coward to attack me from behind when I wasn’t expecting it.
“I only want justice, but I don’t know if I will get it.”
Witnesses or anyone with information about the attack at around 5.45pm on July 27 are urged to call police on 101.