Rory Best's commitment in an Ireland jersey has never been in doubt.
You may remember what we all know as 'The Ryan Crotty Game' - the agnonising loss to the All Blacks during the 2013 November internationals.
Best scored Ireland's second try of that game in a furious opening 20 minutes. The hooker would not even last that 20 minutes. The reason: a broken arm sustained in a tackle. Despite the injury, Best still played on for another minute, at one stage clearing out a ruck.
Later that season, during the latter stages of the Six Nations, Best would again show his grit.
Speaking to Press Association Sport at yesterday's launch of the Six Nations, the 34-year-old disclosed that he played Ireland's final two games of that tournament in 'unbelievable discomfort' due to a dislocated rib.
Best played 54 minutes of an easy win against Italy in Dublin and then 68 minutes of a narrow victory against France in Paris.
I remember the Championship win we had in 2014, I hurt my rib in training going into the last block of games.
And I played the last two games, Italy and France away, I had just unbelievable discomfort, the thing just kept almost popping in and out.
Best's personal philosophy on injuries is that as long as there's no risk of long-term damage or him being a liability on the pitch, he will play on through the pain.
As long as I feel it's not going to be detrimental to the team or it's not going to cause a long-term injury, and it's not a risk, if it's a pain thing, then I'd keep going.
Look, as long as I feel there's not going to be a moment when it comes to make a tackle and I can't do it because of a problem, then I would be fairly comfortable that I'm not going to let anyone down.