Ismael Miller has begun jogging at West Bromwich Albion.
The Baggies striker has been sidelined since the first week of the season when he picked up a thigh problem in training.
"Ishmael Miller has started to do some light jogging," Di Matteo told the WBA website. "We said at the beginning Ishmael was going to be out for a substantial amount of time.
"He's doing well but he is not going to be ready in the near future."