Harlequins second row Charlie Matthews could be handed a lengthy ban after he was cited for allegedly making contact with the eye area of Leinster flanker Dominic Ryan during Saturday's European Champions Cup match at the Aviva Stadium.
Lock Matthews was shown a yellow card after the incident by referee Romain Poite late in the game, which Leinster edged 14-13 thanks to Ian Madigan's 71st-minute penalty.
The disciplinary panel will meet in London today, with a low end sanction lasting 12 weeks, mid-range 24 weeks, while Matthews could be banned for a year for a more serious offence.
A statement from European Professional Club Rugby (EPCR) read: "EPCR has received a citing complaint against the Harlequins second row, Charlie Matthews (No 4), following the European Rugby Champions Cup Round 4 match against Leinster Rugby on Saturday, December 13, 2014.
"Matthews is alleged to have made contact with the eye area of the Leinster wing forward, Dominic Ryan (No 7), in the 77th minute of the Pool 2 game at the Aviva Stadium in contravention of Law 10.4 (m). He was shown a yellow card following the incident by referee, Romain Poite (France).
"The complaint was made by the match Citing Commissioner, Stefano Marrama (Italy)."
Steve Hansen, meanwhile, has signed a contract extension that will keep him at the helm of New Zealand until 2017.
The 55-year-old was appointed as the All Blacks head coach following their World Cup win in 2011 and will lead their attempts to retain the crown in England next year.
In awarding Hansen a new deal through to the end of the 2017 season, the former Wales coach will also be in charge when the British and Irish Lions tour New Zealand.