Zach Robinson is facing a lengthy spell on the sidelines after rupturing his achilles in training.
The striker sustained the injury during a shape walkthrough on Tuesday morning.
At this stage, there are no clear timescales involved, but it is expected the 22-year-old will be out long-term. Robinson went to see a specialist on Tuesday afternoon and will undergo surgery on Thursday.
He will be out for a considerable period of time, including the rest of this season.
“This is a real blow,” manager Stuart Kettlewell said.
“We have been working to get players back to fitness, which has been going well, but to then be dealt this news, it’s gutting. We now have seven players unavailable which is far from ideal.
“We were just going through team shape for Wednesday’s game at walking pace, and Zach went down as he went for the ball.
“With no signs beforehand of an upcoming injury, it’s disappointing all round. Most importantly, the player needs to be looked after. We have a great medical team here and all the players and staff will support him through this period.”
As a club, we will support Zach during his time on the sidelines, and we wish him a speedy recovery.