Samoa's George Pisi has been cited over an alleged dangerous tackle on Tommy Bowe during the first-half of Saturday's game.
The centre was shown a yellow card just before half-time for the tackle.
He must appear before a hearing in London tomorrow.
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If he is found guilty, Pisi could be suspended for Northampton's Heineken Cup double-header against Leinster.
©INPHO/Ryan Byrne