Unfortunate to celebrate an opponents misfortune, but not having O'Brien is a big loss for the Irish.
When in form he is arguably the best fetcher in the game. He is a complete nuisance at the ruck, and the Irish will be weaker without him. He was perhaps the most influential B&I Lion on their more recent tour.
This injury increases the Bok chances of defeating the Irish in the first round knock-out matches.
The Irish were not as good this year as last year, with the Welsh and English looking better in the 6-nations.