Harry Byrne has won the race to start at out-half for Leinster in Sunday's Investec Champions Cup Round of 16 clash with Edinburgh, as head coach Leo Cullen drafts in his heavy hitters for the visit of the Scottish side.
Cullen has made four changes to his team from last week's 36-19 win against Scarlets, with Tadhg Furlong and Jimmy O'Brien coming through minor knocks to be included in the starting team for the Aviva Stadium clash (5.30pm).
James Ryan continues to miss out as he deals with a calf issue, while Garry Ringrose is also unavailable due to injury.
The big call comes at number 10, where Byrne gets the nod to start, and the versatile Ciarán Frawley is among the replacements, with Sam Prendergast missing out on the matchday 23.
Leinster head coach Leo Cullen has made four personnel changes to his team for Sunday's Investec Champions Cup clash against Edinburgh at Aviva Stadium pic.twitter.com/o4BDg2D6yZ
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Cullen has retained his starting front row from last Friday's win, with Andrew Porter and Furlong packing down either side of Dan Sheehan, while loosehead Alex Usanov is set for his Champions Cup debut off the bench.
Ryan Baird returns from his four-month broken leg layoff to start at second row, joining Joe McCarthy in the engine room with Brian Deeny dropping to the bench.
Captain Caelan Doris is at number 8, with Josh van der Flier at openside, and Jack Conan comes in for Max Deegan on the blindside.
Jamison Gibson-Park continues at scrum-half, with his half-back partnership with Byrne retained.
Rieko Ioane swaps in for the injured Ringrose to partner Jamie Osborne, while Robbie Henshaw wears the 23 shirt on the bench.
Tommy O'Brien is retained on the right wing, while Hugo Keenan's return to full-back sees Jimmy O'Brien shift to the left wing, and Joshua Kenny drop out.
Leinster: Hugo Keenan: Tommy O'Brien, Rieko Ioane, Jamie Osborne, Jimmy O'Brien; Harry Byrne, Jamison Gibson-Park; Andrew Porter, Dan Sheehan, Tadhg Furlong; Joe McCarthy, Ryan Baird; Jack Conan, Josh van der Flier, Caelan Doris (capt).
Replacements: Gus McCarthy, Alex Usanov, Thomas Clarkson, Brian Deeny, Max Deegan, Luke McGrath, Ciarán Frawley, Robbie Henshaw.
Jake Flannery (above) and Jack Murphy have made welcome injury returns for Ulster, as Richie Murphy's out-half crisis is easing just in time for their EPCR Challenge Cup Round of 16 meeting with Ospreys on Saturday (8pm).
Flannery has recovered from a shoulder injury to start for the province at Affidea Stadium tomorrow night, while Jack Murphy's rib injury has healed enough for the 21-year-old to be included on the bench.
In total, the province have made seven changes to their side for the visit of the Welsh region, who beat them 21-10 when these sides met in the URC in February.
Rob Herring continues at hooker, with first-choice prop Angus Bell and Tom O'Toole either side of him, while Cormac Izuchukwu comes in at lock to partner captain Iain Henderson.
Juarno Augustus returns at number 8, with Bryn Ward dropping to the bench, while David McCann and Nick Timoney continue on the flanks.
Flannery is joined in the half-backs by Nathan Doak, who returns to the starting side after playing from the bench last week.
Jacob Stockdale comes in for Zac Ward on the left wing, with Werner Kok continuing on the right and Ethan McIlroy at full-back.
The centre partnership of Stuart McCloskey and James Hume go again, as the province look to set up a Round of 16 tie with either Newcastle of La Rochelle in Belfast next week.
Ulster: Ethan McIlroy; Werner Kok, James Hume, Stuart McCloskey, Jacob Stockdale; Jake Flannery, Nathan Doak; Angus Bell, Rob Herring, Tom O'Toole; Iain Henderson (capt), Cormac Izuchukwu; David McCann, Nick Timoney, Juarno Augustus.
Replacements: Tom Stewart, Sam Crean, Scott Wilson, Charlie Irvine, Bryn Ward, Conor McKee, Jack Murphy, Zac Ward.
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