Erik Ten Hag wanted to keep the 22-year-old at Old Trafford during pre-season so that he could fully assess him, and how he might fit into United’s plans.
However, Chong has now been given permission to leave, and it looks like Birmingham have beaten rivals West Brom to his signature, having agreed a nominal fee.
Chong, who is in the final year of his Manchester United contract, is due to undergo a medical in Birmingham shortly.
