Scotland fly-half Finn Russell faces a ban from Six Nations action after being cited for his dangerous tackle on Wales' Dan Biggar.
Russell collided with his opposite number just as Biggar was leaping for a high ball during the first half of Wales' 26-23 win at Murrayfield on Sunday.
The 22-year-old caught Biggar's legs with his shoulder, causing the Ospreys half-back to land on his shoulder.
Referee Glen Jackson showed Russell a yellow card following the incident in the 30th minute, but Wales head coach Warren Gatland claimed after the match it should have been red.
Wales had Jonathan Davies sinbinned for a dangerous tackle on Alex Dunbar moments later and Gatland said: "My initial reaction was the first was red and the second was yellow. Those were my gut feelings.
"But I'm looking at it from a Welsh perspective. The referee's got to make the call and you have to live with the decision and move on."
Russell has now been called to appear before a three-man disciplinary panel later this week by independent citing commissioner Eugene Ryan.
He is charged with breaching Law 10.4(e) which states players "must not tackle an opponent whose feet are off the ground".
He is also accused of breaching Law 10.4(j) which prohibits "lifting a player from the ground and dropping or driving that player into the ground whilst that player's feet are still off the ground such that the player's head and/or upper body come into contact with the ground".
Source: AFP