Wasps' Ashley Johnson has been cited for the tackle on Dave Kearney during Saturday's Champions Cup game that forced the Leinster wing to come off injured.
Johnson was given a yellow card for the tackle just 17 seconds into the 20-20 draw.
Kearney played no further part in that game but is no longer considered doubtful for Ireland’s Six Nations opener away to Italy on 7 February.
Johnson is alleged to have committed a dangerous tackle on Kearney, and will face a hearing in Dublin on Thursday.
If found guilty, Johnson faces a ban of three weeks if the offence is judged to be at the low end of severity; six weeks if it is considered a medium-level offence; and between 12-52 weeks if it is reckoned to be at the top end of the range.
After the game, Leinster coach Matt O’Connor voiced his frustration that “we lose a bloke for 80 minutes; they lose a bloke for 10 minutes. Now that doesn't make sense to me, but I haven't seen the incident again.
"I don't know whether it was right or wrong. A bloke takes a guy out illegally, and we lose a guy which compromises the bench, and they lose a bloke for 10 minutes.
"There is a duty of care on the player to make sure guys land safely."
