Sheffield Eagles could be without two key players when they face Doncaster on Easter Sunday.
A win at Workington Town came at a price with record try scorer Menzie Yere and back row forward Michael Knowles failing to finish the game with knee injuries.
Knowles had to be taken off before half-time and Yere, who scored 46 tries last season, went off late in the game.
“Michael has a medial ligaments strain and Menzie something similar” said coach Mark Aston. “We got the win but there’s a cost, we will have to take stock with Doncaster coming up.” Eagles fifth round Tetley’s Challenge Cup game at Castleford Tigers will be played on Sunday 27 April, kick-off 3.30pm.