Leeds midfielder Paul Green is hoping injured striker Steve Morison can quickly return to full fitness.
Morison is struggling with a calf injury after being withdrawn at half-time during last week's home draw with Peterborough and missed the derby defeat to Huddersfield on Saturday.
Manager Neil Warnock was without both first-choice forwards against the Terriers - Ross McCormack missed out with a head injury - and was forced to hand a first start to Habib Habibou.
"Steve is out with his calf, but hopefully it's not too serious because obviously Steve is a big threat up there," Green said.
"He causes defenders all sorts of trouble with his size and mobility and he'd just hit a rich vein of form getting the two goals at Palace.
"Hopefully we can get him back and keep him fit."
The 19-year-old striker has made the first-team breakthrough at Bramall Lane this season, making 11 substitute appearances for Danny Wilson's side.
"Joe has done very well this season and taken advantage of us having a limited number of striking options," Wilson told the club's official website.
"He has filled a void very well and that enabled us to let Chris (Porter) move to Shrewsbury Town on loan.
"That is a credit to Joe that he has proved he could step up to the challenge if required.
"Let's hope he can develop into the very good player we expect him to."
Ironside, a member of the Blades youth team which reached the FA Youth Cup final in 2011, made his first appearance in the Johnstone's Paint Trophy win at Notts County in October and his league debut at Carlisle in December.