The Munster and Leinster coaches will name their teams today ahead of tomorrow's derby at the Aviva Stadium.
Meanwhile, Connacht and Ulster will meet tonight in their first inter-pro meeting of the season.
Ulster travel to Galway to take-on the defending champions, with kick-off at the Sportsground at 7.35pm.
Also tonight, Edinburgh will host Treviso, while the Ospreys take-on the Cardiff Blues at the Liberty Stadium.
