Discipline.

Iain Henderson’s Six Nations could be over before it even starts after he was penalised on his return to action on Saturday in the Guinness PRO14 with Ulster.

The lock, who has been out injured for the last number of weeks and is yet to feature for Ireland in the Six Nations, was pinged for a neck roll in the win over Ospreys.

But the incident involving Ospreys openside Sam Cross looks pretty bad the more you watch it, and could result in a citing and suspension for the Ulsterman.

Joe Schmidt is already without Devin Toner for the rest of the Six Nations and is awaiting an update on Tadhg Beirne. Should Henderson pick up a suspension it looks like Quinn Roux and James Ryan will continue in the second-row against Italy.

UPDATE: Henderson has indeed been cited for this incident. He will face a disciplinary committee tomorrow (Tuesday). The lock has been reported by the Citing Commissioner in charge for alleged infringement of Law 9.11 – Players must not do anything that is dangerous to others