The Express & Star says Bolton today remained confident of landing Petrov despite reported last-minute interest from Villa.
It's reported Villa have held discussions with the free agent, who has been released by Manchester City after snubbing their offer of a new one-year deal.
But sources in the north-west say the Trotters still expect to sign the 31-year-old after he underwent a medical at the Reebok Stadium.
That is unlikely to deter Villa, however, and with Wanderers yet to agree personal terms they could yet steal a march with the chance to play European football next season and join a club of superior stature likely to appeal to the player.
A move to the Midlands would also give him the chance to link up with close friend and compatriot Stiliyan Petrov.