England prop Joe Marler has been cited for "allegedly striking" Rob Evans during Saturday's RBS 6 Nations match at Twickenham.
The incident occurred in the 15th minute of the first-half and follows the citing of Wales prop Tomas Francis. News of Francis' citing broke on Sunday afternoon, but Marler's took a further day.
A statement from the Six Nations read: "The citing commissioner continued his review of the match overnight and considered that the incident in the 15th minute involving Mr. Marler should also be the subject of a citing (the relevant disciplinary rules provide that the deadline for citing complaints is ordinarily 48 hours after the end of the match in question)."
Marler will face a Six Nations disciplinary committee later this week and could face further action if the citing officer deems his verbal exchange with Samson Lee worthy of a potential suspension.
If Marler misses out at the Stade de France, Mako Vunipola will start at loosehead with Matt Mullan on the bench.
England head coach Eddie Jones said: "It's not in the spirit of the game. Joe understands that and that's why he apologised straight away.
"People makes mistakes, we all make mistakes. The fact that he apologised at half-time is a real testament to Joe's character.
"You don't apologise at half-time in a game of rugby unless you mean it. He's been apologetic about it and wants to get on with it. There's a judicial process in place so we'll let that run its course. At the moment Joe is available and he will be available until the judiciary says he's not."
Asked about the Marler incident with Lee, Wales assistant coach Rob Howley told a press conference on Monday: "As players and coaches, there is banter in the game, and there is no place for that [Saturday's incident].
"Samson is the best person you can ask about that. He had a fairly different take on it. As far as we are concerned, there is no room in the game for that. We all love the game of rugby, and the one thing about rugby after the game, players get on with players. We will just wait for that process to finish.
"This is the first time in my experience of being involved with international rugby that it has happened. It's a minority one, really. I am sure World Rugby will decide, effectively, what to do, and we will support them in whatever that decision is."