Lack of experience won't be an issue - McGrath
Robbie Henshaw is the most capped member of Leinster's Johnny Sexton-less inside backline, but scrum-half Luke McGrath is actually the elder statesman.
The 23-year-old is four months older than the Athlone native who has amassed 22 Ireland appearances in his short, but illustrious career.
With Joey Carbery (20) and Garry Ringrose (21) completing the quartet, there is a collective inexperience to the combination that will fill Leo Cullen with concern this week as they prepare to go to the bear-pit of Montpellier away.
Sexton has not been ruled out of Sunday's game, but if he doesn't make it McGrath reckons the kids will be alright. "I'm the oldest of the four lads and they've been giving me a good bit of slagging over it," the UCD man said.
"The lads at Nos 10, 12 and 13 are all naturally good footballers. They all play their own game and we have been focusing on their strengths. We haven't thought about combinations or anything. Everyone has been playing their own game and they seem to feed off each other very well.
"Joey's been brilliant. Towards the end of last year when he was playing with Clontarf he was showing that ability. He has just slotted in seamlessly. He was excellent again at the weekend. He's been brilliant this season so far."