Bath and South Africa flanker Francois Louw has been banned for three weeks for making contact with the eye area of Benetton lock Marco Fuser.
The incident took place during Bath's 23-0 win over the Italian side in the first round of the European Champions Cup on Saturday. Fuser was cleared after being cited himself.
A statement from European Professional Club Rugby said: "The committee upheld the citing complaint and determined that the offence warranted a red card.
"The committee found that the offence was at the low end of World Rugby's sanctions and selected four weeks as the appropriate entry point.
"There were no aggravating factors, however, as Louw did not have a clean disciplinary record, the committee decided to reduce the sanction by only one week before imposing a suspension of three weeks."
There was also a suspension for Leicester flanker Mike Williams, who admitted making contact with the head of Racing 92 centre Henry Chavancy during the Tigers' 22-18 defeat in France.
Leicester head coach Matt O'Connor said ahead of the hearing: "I think there are 50 or 60 of those in a game. I think we're in a really dangerous place if that's going to be the standard of what we're looking at in relation to bringing blokes before the judiciary."
The heftiest penalty of the day was handed down to Stade scrum-half Terry Bouhraoua, who is ruled out for four weeks for making contact with the eye area of a player and use of a knee during the French side's defeat at Russian club Krasny Yar.