Leeds are waiting for midfielder Rudy Austin's second scan results to learn the full extent of his injury after he suffered a suspected broken leg in the weekend defeat to Watford.
Manager Neil Warnock said after Saturday's 6-1 loss at Elland Road that the Jamaica midfielder had broken his leg in two places and feared his season was over.
"We were all shocked by what happened and our thoughts were with Rudy. Other things pale into insignificance when you see things like that," Warnock told the club's official website on Monday.
"We'll know more about the full extent once the swelling has gone down and he has had a further scan."
The 27-year-old sustained the injury in a collision with Watford defender Marco Cassetti early in the second half and Leeds were subsequently reduced to nine men after the Jamaican was stretchered off, as Warnock had already used his three substitutes and Jason Pearce had been shown a straight red card just before half-time.
Austin signed for Leeds from Norwegian side SK Brann for an undisclosed fee in the summer and had been a regular starter for Warnock, scoring three goals in 19 appearances.