He has initially been invited to train for a month on a non-contract basis with Villa, who start life in the Championship with a trip to face Sheffield Wednesday at Hillsborough on 7 August, having been relegated to the second tier for the first time since 1987.
Petrov’s battle with leukaemia
Petrov was then Villa boss Martin O’Neill’s first signing when he arrived from Celtic for £6.5m in August 2006.
He first showed symptoms of leukaemia after developing a fever following a 3-0 defeat at Arsenal in March 2012 and was diagnosed with the disease a few days later after making 218 appearances for Villa and more than 500 in British football.
He had four months of chemotherapy before it was announced in August of the same year that the disease was in remission.