Harry Newman limped off the field last week in Leeds Rhinos’ victory over Wakefield Trinity and now head coach Richard Agar has given the prognosis.
“He’s had a reoccurance of the hamstring injury that he had before,” Agar said.
“We’ve got some further tests coming up which is obviously disappointing as we couldn’t have been more careful with it – it was fully healed, we kept him back extra time.
“It was the collision that he went down in that did it, but he brought loads of energy to the team.
“It’s obviously a major disappointment for us and we are looking at similar timeframes but we’re being ultra careful,
“We couldn’t have been anymore careful, but I think it will be four to five weeks.
“He was fully ready to go we just kept him back to get some more high speed running in him.”
Agar will also be without the suspended Kruise Leeming and Cameron Smith as they welcome Hull FC to Headingley tomorrow night.