Scott Murray will face an independent disciplinary hearing in London on Wednesday after his red card in Scotland's RBS 6 Nations Championship defeat to Wales.
Murray was given his marching orders just 22 minutes into Scotland's 28-18 defeat after he retaliated to a late tackle from Ian Gough by lashing out with his boot and catching the Wales lock in the face.
The former Scotland captain apologised immediately and shook hands with Gough on the field.
Murray's remorse will no doubt be taken into consideration by the panel, but under International Rugby Board guidelines he faces a ban of up to 12 months.
The panel will comprise of chairman Paul Mauriac (France), Peter Boyle and Dr Barry O'Driscoll (both Ireland).
England's preparations for the Autumn International series were potentially dealt a further blow as Maro Itoje was forced to undergo an x-ray after Saracens' European victory over Scarlets on Saturday night.