Ambrose has been out of action after suffering severe bruising earlier in the season.
“Darren is progressing well and has done some light jogging,” Burley told the Croydon Guardian.
“It’s going to be two or three weeks before he is ready.
“It is a boost that it wasn’t broken because as I have said from day one, Darren is a key player for us having scored 20 goals last season and its been a big blow him being out.”
