The Blues have a key injury doubt just one day out from the State of Origin opener.
Stephen Crichton limped off the field after a training session at Ballymore on Monday.
He was also spotted sporting ice on his left thigh.
NSW coach Laurie Daley has confirmed Crichton is dealing with a cork but is "unsure" how the star centre's injury is progressing ahead of Game 1 on Wednesday.
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"I'm unsure at this stage because I haven't checked in with the medical staff," Daley told Today on Tuesday morning.
"He copped a corked thigh, so we'll see how it pulls up overnight.
"He came to the team dinner last night. He looked to be okay, but you never know with these things.
"Hopefully, he can do a little bit this morning."
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Crichton has notably played in every Origin clash since making his debut in 2022.
The 24-year-old's training injury has seen Matt Burton placed "on standby" to possibly fill the 18th man spot, per 9 News' Danny Weidler.
Campbell Graham, meanwhile, is in line to slot into the starting side if the Bulldogs captain is withdrawn.
However, Blues teammate Connor Watson isn't overly concerned with Crichton's fitness.
"He's all good, just had a bit of ice on his quad," he said on Monday.
"Little cork, maybe, but he's all good. He'll be right.
"I think it's a cork, so he will be good. You can ice them up, get a bit of heat into them, and you'll be sweet."
In positive news for Blues fans, Daley confirmed that Payne Haas will "definitely" be playing in the opener.
The enforcer came into camp under an injury cloud, but has seemingly recovered from his quad strain.