Andy Farrell: 100-cap Peter O'Mahony is one of the best I've ever seen

While Ireland's Rugby World Cup fate is on the line on Saturday, it's also set to be a personal milestone for flanker Peter O'Mahony as he wins his 100th Irish cap.

The 34-year-old officially brought up a century of Test matches last weekend, but with one of those coming for the British and Irish Lions in 2017 on their tour of New Zealand, the Pool B decider with Scotland will mark his 100th in an Irish shirt.

Current Ireland head coach Andy Farrell has worked with the back row across three different sides in the last seven years; first with Munster, then with Ireland, as well as the Lions in 2017.

And the Irish coach was fulsome in his praise for the centurion.

"We can it here all day the two of us and talk about what he brings, what he means to us all, what type of bloke he is, what type of family man he is, but we'd be here the whole press conference. To sum him up, he's selfless," Farrell said, after naming him in the starting side for Saturday's game at Stade de France.

It's no secret that O'Mahony is one of the key leaders in the side both on and off the pitch; he first captained Ireland as a 23-year-old on just his 16th cap during the summer tour of North America, while he's been Munster skipper since 2013.

But Farrell [below] believes those outside of the Irish and Munster squad have only seen a glimpse of his leadership qualities.

"You guys would see the performance on the pitch and it's heroic from Pete. You can see what it means for him to play for Ireland, but we obviously see behind the scenes and he's definitely, 100%, one of the best I've ever seen at making the dressing room feel right.

"And it's not just a skill. It's him being himself because it's genuine and I'm sure Johnny [Sexton] would echo this, that