Grayson said: "We've had the X-rays and there's no break in there. I don't know where that suggestion came from.
"Luci is having treatment and we'll see how he goes. I'm not one for setting timescales on players nor do I like talking about injured players and setting targets. We'll see how he progresses."
Shane Higgs, Jason Crowe, Robert Snodgrass, Rui Marques, Ben Parker and Leigh Bromby have all been sidelined through injury in recent weeks, but have another week of rehabilitation before Leeds return to action against Norwich at Elland Road on Monday.