'Tongan Thor' is alleged to have contravened Law 9.13 in that "a player must not tackle an opponent early, late or dangerously" for an incident that involved Stormers winger Craig Barry.
The citing commissioner deemed that the incident, which happened in the ninth minute of the match, had met the Red Card threshold for foul play.
After the match Nick Mallett, the former Springbok coach and now commentator, along with former Springbok Naas Botha, said Tupou should have been red carded at the time.
