Twitter was awash with rumour during the first half between Ireland and France that Sean O'Brien may have thrown a dig at Pascal Pape.
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The incident was not highlighted on TV3 but it was on ITV.
If he is cited - and that's highly likely - he would almost certainly miss the quarter-finals and possibly more should Ireland progress further in the competition.
The real pity is that O'Brien had a storming game for Ireland and this adds major worry on top of the losses, to injury, of both Johnny Sexton and Paul O'Connell.
