All the team news and for Fiday's opening round Challenge Cup fixtures.
United Rugby Championship: James Lowe back from injury for Leinster against Ulster who will be captained by Iain Henderson
The United Rugby Championship season continues this weekend including the highly anticipated derby between Leinster and Ulster at the RDS Arena.
United Rugby Championship: Munster maul helps them past Connacht while Leinster, Bulls and Benetton also win
There were United Rugby Championship wins for Munster, Leinster, the Bulls and Benetton over Connacht, Glasgow, Ospreys and Edinburgh on Saturday.