Peterborough boss Darren Ferguson is hoping his injury concerns are not exacerbated when Lee Tomlin and Lee Frecklington are assessed this week.
Posh are already without captain Grant McCann for at least six weeks with a knee problem.
Forward Tomlin will receive a scan on Tuesday after going off an hour into Saturday's 1-0 win over Coventry.
"It's a similar thing to Grant but maybe not as bad," Ferguson told BBC Radio Cambridgeshire.
"Lee Frecklington is also struggling so we'll have to assess them."
Midfielder Frecklington limped off after 49 minutes at the weekend and, with McCann sidelined until the new year, Ferguson could turn to youth-team players to plug the gaps.
"If those two are going to be out for a sustained period then other people will get opportunities," he said. "We'll have to play some of the kids.
"I have no problem with that. I'm comfortable with whoever I put in the team. They know the system and how we want to play."
Daniel Kearns made his first Championship start in McCann's absence.
The 20-year-old Irishman was a summer signing from Dundalk and had been limited to six substitute appearances until the visit of the Sky Blues.
"It's been great since I've been here. Everyone at the club has been excellent to me," he said.
"I'm finding my feet now. I've come on for the last 20 minutes in the last three or four games and think I've done quite well and I was delighted with my first start."