Argentina prop Enrique Pieretto has received a seven-week ban for stamping during the Pumas' Twickenham defeat against England last Saturday.
Substitute Pieretto was sent off by French referee Pascal Gauzere after the official consulted video replays of a second-half incident that showed him stamping on England prop Joe Marler.
A statement released by the autumn international disciplinary said that Pieretto appeared by video conference before a World Rugby-appointed disciplinary committee, when he accepted that he had committed an act of foul play, but claimed it did not warrant a red card.
The disciplinary committee disagreed with Pieretto's view, though, and believed it was a red card offence.
"As for sanction, the disciplinary committee determined that Mr Pieretto's actions had been intentional and that they merited a top-end entry point based on World Rugby's scale of seriousness, which carries a nine-week playing suspension," the statement read.
