Leeds full-back Jack Walker will undergo scans following a hamstring injury against Huddersfield, interim-boss Jamie Jones-Buchanan confirmed.
Walker, 22, was forced from the field in the first half on Thursday night at Headingley Stadium.
His side went on to draw 20-20 after conceding two tries in the last two minutes.
Leeds, who sit second bottom of the Super League table, face Castleford on Easter Monday but will be without Walker.
Leeds boss confirms Jack Walker blow
“He looks to have a pretty significant twang on his hamstring,” Jones-Buchanan said.
“We’ll have to scan that in the next couple of days. Typically it’s Bank Holiday and nobody is open, but we’ll do our best. We’ll find out what’s wrong with him.
“I’m just trying to articulate to him that it’s really important he keeps his head up and keeps positive. He’s done some wonderful work for us in a really difficult period.
“Liam Sutcliffe is more than capable of full-back. We’ll do a lot of work with him. It means maybe Kruise (Leeming) or others, hopefully when we get Aidan Sezer back in, will tuck in at half.”
Jones-Buchanan proud of effort
The interim-head coach said he was proud of his side’s effort despite throwing away a 20-10 lead in the final minutes of the clash. However, he says the team were not as positive following the full-time hooter.
“They were devastated. They looked like they’d lost a final,” he said.
“Their eyes were glazed over, looking at the floor, and that is my big concern because we have to snap out of it now.
“We have to go again Monday. Because if we can compete like we did tonight on Monday and without looking too far ahead and we get the rest of the week right, we might get to the back end of next week and think we’ll take what happened today as a big learning curve.
“I’ve just got keep pulling them in that right direction.
“We were really good for maybe 75 minutes. I’m really proud of the boys for the courage that they’ve shown tonight and also this week.”