Sean O'Brien has been named on the bench for Leinster's semi-final clash with Ulster tomorrow night at the RDS.

Rhys Ruddock is in a back row that includes Shane Jennings at openside and Jamie Heaslip at number 8.

Mike Mc Carthy's injury means Quinn Roux is in the second row beside Devin Toner while Cian Healy, Sean Cronin and Marty Moore form the front row,

Eoin Reddan returns to scrum half where he partners Jimmy Gopperth, while Fergus Mc Fadden and Dave Kearney are on the wings.

Brian O'Driscoll and Gordon D'Arcy are in the centre and Rob Kearney is at full back.

Jack McGrath, Leo Cullen, Ian Madigan , Isacc Boss and Zane Kircher are on the bench.

Rory Best and Ruan Pienaar have been included in the Ulster team.

Craig Gilroy keeps his place at full-back and is joined in the back three by Tommy Bowe on the right wing and Andrew Trimble on the left.

Jared Payne is selected at outside-centre, with Darren Cave starting the match at 12.

Up front, Callum Black is retained at loosehead, with Best starting the game at hooker and Ricky Lutton at tighthead.

Ulster captain, Johann Muller, starts in the second row and is partnered by Iain Henderson who will wear the No 5 jersey.

Robbie Diack has recovered from the ankle injury that he sustained against Connacht and joins Chris Henry and Roger Wilson in the back row.