Ulster prop John Afoa is in danger of missing the Heineken Cup semi-final against Edinburgh after being cited for an alleged dangerous tackle on Munster full-back Felix Jones.
Afoa, the New Zealand World Cup winner, will appear before independent judicial officer Jean-Noel Couraud in Dublin on Thursday.
If Afoa is found guilty, International Rugby Board guidelines state the minimum entry level suspension for a dangerous tackle is three weeks.
Ulster's semi-final showdown with Edinburgh is at the Aviva Stadium on April 28.
The alleged incident occurred 46 minutes into Ulster's 22-16 victory over Munster at Thomond Park.