Both Ulster and Leinster have named their teams for the crucial PRO14 clash at the Kingspan Stadium tomorrow evening (LIVE on eir sport 1 from 7pm).
Marcell Coetzee returns from injury to take his place in the back row for Ulster alongside two former Leinster men in skipper Jordi Murphy and Nick Timoney.
Eric O’Sullivan and Tom O’Toole start in the front row with John Andrew retaining his place at hooker. Alan O’Connor and Kieran Treadwell combine in the engine room.
Winger Robert Baloucoune comes into the starting back three alongside Jacob Stockdale and Michael Lowry after making his return from injury off the bench last week in the victory over Ospreys.
John Cooney and Ian Madigan combine at half-back, with Stuart McCloskey and James Hume again named in the centre.
Meanwhile, Leinster have included four players released from the Ireland camp in their starting XV with Ross Byrne, Ed Byrne, Rhys Ruddock and Josh van der Flier all set to start.
Ed Byrne is joined by James Tracy and Michael Bent up front, with Devin Toner and Scott Fardy linking up again in the second row.
Ruddock and Van der Flier are joined in the back row by Scott Penny who was named man-of-the-match in last weekend's 40-21 win over Glasgow Warriors.
Ross Byrne and skipper Luke McGrath are the half-back pairing, with Rory O’Loughlin and Jimmy O’Brien named in the centre.
The back three comprises Max O’Reilly, Cian Kelleher and Dave Kearney.
Ulster: Michael Lowry, Robert Baloucoune, James Hume, Stuart McCloskey, Jacob Stockdale, Ian Madigan, John Cooney, Eric O’Sullivan, John Andrew, Tom O’Toole, Alan O’Connor, Kieran Treadwell, Nick Timoney, Jordi Murphy (c), Marcell Coetzee.
Replacements: Adam McBurney, Andrew Warwick, Marty Moore, Cormac Izuchukwu, Sean Reidy, Alby Mathewson, Stewart Moore, Rob Lyttle.
Leinster: Max O'Reilly, Cian Kelleher, Jimmy O'Brien, Rory O'Loughlin, Dave Kearney, Ross Byrne, Luke McGrath (c), Ed Byrne, James Tracy, Michael Bent, Devin Toner, Scott Fardy, Rhys Ruddock, Josh van der Flier, Scott Penny.
Replacements: Sean Cronin, Peter Dooley, Thomas Clarkson, Ross Molony, Josh Murphy, Rowan Osborne, Jamie Osborne, Jack Dunne.
***See FIVE LIVE PRO14 games this weekend on eir sport.