YOUNG Town defender Tom Clarke could have a further scan on his damaged left leg later this week.
The 17-year-old was carried off during Saturday's 2-1 win against Oldham with a suspected fractured fibula.
Fortunately, X-rays revealed no break and Town will let the injury settle before deciding on further analysis.
"It's difficult to put a timescale on how long Tom might be out - it might be three or four weeks or it might be less than that," said Jackson today.
"We will see how he settles down first and take things from there.
"It could be some sort of muscle injury that he's got, so we may send him for an ultrasound scan to provide us with more information.
"It's obviously a frustration for Tom after winning a place in the side and doing so well, but at least he's got no broken bones and will be able to start his rehab straight away."
Midfielder Tony Carss - who took over from Clarke in the left-back slot after 71 minutes of Saturday's game - will not be risked in tomorrow's Reserve game against Notts County at the Galpharm (2.00).
The 28-year-old who had hernia surgery a month ago will, instead, have an injection in his groin.
"I would have liked Tony to play tomorrow and get a full 90 mintues under his belt, but that's not going to be possible," said Jackson.
"He needs an injection just to help his recovery and, while it's nothing serious, the best time for him to have it is tomorrow."
Loan striker Delroy Facey trained with his Galpharm teammates for the first time at an icy Storthes Hall yesterday and he has already made a big impression according to the manager.
"I was delighted with how Delroy played on Saturday, just hours after signing for us on loan," said Jackson.
"What pleased me particularly was the way in which he encouraged all the young lads.
"In the second half, when we were finding the going a bit tough, he was geeing up everyone on the pitch and that shows his tremendous commitment.
"It was a great statement of intent from Del that he wants to do everything he can for his hometown club and, with the way he was in the dressing room on Saturday and the way he was on the training ground yesterday, it's just like he has never been away."
Andy Holdsworth is not playing tomorrow because he had 80 minutes on Saturday.