Johnny Sexton will be a key figure at the heart of Wales v Ireland, with his on-field persona known to be one of the most intense in the sport.
The Irishman has once again been central to the build-up, revealing his hurt at Warren Gatland's decision to leave him out of the 2021 Lions squad.
Gatland, for what it's worth, has admitted he made a mistake in doing so, while anecdotes have also emerged of Welsh players initially finding the demanding Irish fly-half hard to work with.
