Petric is set to be pressed into action.
The Croatian striker came on as a substitute and showed some promising signs in his first outing.
He said: "I hope I can help the team, not only scoring goals but in the games. This was my first match for three-and-a-half months, so of course I am not 100 per cent.
"All the other players had a pre-season, while I have to get up to speed in a short space of time.
"I have a bit more to do but I am sure I'll be match fit very soon."