Leinster aim to increase their lead at the top of the Magners League tonight.
With a two-point advantage over the Llanelli Scarlets, the Irish Blues entertain Cardiff Blues at the RDS.
And they welcome back Ireland wing Shane Horgan, Australian scrum-half Chris Whitaker, and South African Ollie le Roux from injury.
Meanwhile, Connacht will climb off bottom spot if they get a result away to the Ospreys at the Liberty Stadium.
The Westerners are a single point behind Ulster, after their win over another Welsh region, the Newport Gwent Dragons at Ravenhill last night.