Leicester Tigers fly-half Toby Flood been cited for an alleged tip-tackle on opposite number Andy Goode during Friday's Aviva Premiership win over Worcester.
Flood will face a Rugby Football Union disciplinary hearing in London on Tuesday and, if found guilty, is likely to be ruled out of his side's crucial Heineken Cup clashes against the Ospreys and Toulouse over the next fortnight.
The England pivot might also be in danger of missing the Six Nations opener against Scotland on February 2.
In further bad news for Leicester, Matt Smith has been handed a Level One Citing for the use of an elbow on Worcester's Alex Grove during the 19-14 victory over the Warriors. Smith's written warning is treated as a yellow card.