The midfielder picked up a foot injury during last weekend's 1-0 defeat and it was initially feared he may have broken it, but a precautionary X-ray showed it is just badly bruised.
Navarro has resumed light training and will be assessed prior to kick-off with Dean Cox, who replaced him against the Lions, on standby to start.
Defender Adam El-Abd is back in training five weeks after fracturing a metatarsal but Saturday's trip will probably come too soon.
Centre-half Colin Hawkins remains the only long-term absentee and he is facing at least another three months on the sidelines after undergoing an Achilles operation last week.
