Eunan O'Kane is looking at a three-match ban after being sent off in Leeds United's 1-0 defeat at Ipswich Town on Saturday afternoon.
Leeds had the better of the early proceedings at Portman Road in the Championship clash, but their chances of victory took a big blow in the 38th minute when O'Kane was sent off.
It has been claimed that O'Kane headbutted Jonas Knudsen.
And if true, the Irish midfielder will be looking at a suspension of three matches.
It would be a further blow for Leeds, who are already getting to grips with Samu Saiz serving a six-match suspension due to spitting.
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Ipswich scored the only goal of the game in the 67th minute through Bersant Celina, who cracked a long range effort past Leeds goalkeeper Felix Wiedwald.
Leeds did have a golden chance to level late on, but skipper Liam Cooper blasted his shot over from just six yards out.
