Sean O'Brien will appear before an independent disciplinary hearing in London this lunchtime.
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The Leinster flanker was cited for striking French second row Pascal Papé during Sunday's victory in Cardiff.
Any ban would be a further blow to the Ireland pack, who are already without injured pair Paul O'Connell and Peter O'Mahony.
It's reported that Jonathan Sexton could be in contention to play on Sunday, after scans on his groin showed his injury were not as bad as first feared.
