Scarlets: 15 Blair Murray, 14 Tom Rogers, 13 Joe Roberts, 12 Johnny Williams (captain), 11 Ellis Mee, 10 Joe Hawkins, 9 Gareth Davies, 8 Taine Plumtree, 7 Dan Davis, 6 Jarrod Taylor, 5 Max Douglas, 4 Tristan Davies, 3 Henry Thomas, 2 Marnus van der Merwe, 1 Alec Hepburn.
Replacements: 16 Kirby Myhill, 17 Sam O’Connor, 18 Archer Holz, 19 Steve Cummins, 20 Ben Williams, 21 Dane Blacker, 22 Sam Costelow, 23 Macs Page.
Stormers: 15 Damian Willemse, 14 Seabelo Senatla, 13 Wandisile Simelane, 12 Ruhan Nel (captain), 11 Leolin Zas, 10 Sacha Feinberg-Mngomezulu, 9 Stefan Ungerer, 8 Evan Roos, 7 Ben-Jason Dixon, 6 Paul de Villiers, 5 Ruben van Heerden, 4 JD Schickerling, 3 Sazi Sandi, 2 JJ Kotzé, 1 Ali Vermaak.
Replacements: 16 André-Hugo Venter, 17 Vernon Matongo, 18 Zachary Porthen, 19 Connor Evans, 20 Marcel Theunissen, 21 Deon Fourie, 22 Imad Khan, 23 Jurie Matthee.
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Munster: 15 Mike Haley, 14 Calvin Nash, 13 Tom Farrell, 12 Seán O’Brien, 11 Andrew Smith, 10 JJ Hanrahan, 9 Paddy Patterson, 8 Gavin Coombes, 7 Ruadhán Quinn, 6 Jack O’Donoghue, 5 Fineen Wycherley, 4 Jean Kleyn, 3 Oli Jager, 2 Diarmuid Barron (captain), 1 Michael Milne.
Replacements: 16 Lee Barron, 17 Josh Wycherley, 18 John Ryan, 19 Edwin Edogbo, 20 Brian Gleeson, 21 Ethan Coughlan, 22 Tony Butler, 23 Dan Kelly.
Edinburgh: 15 Wes Goosen, 14 Darcy Graham, 13 Piers O’Conor, 12 James Lang, 11 Duhan van der Merwe, 10 Ben Healy, 9 Ben Vellacott, 8 Magnus Bradbury (captain), 7 Dylan Richardson, 6 Liam McConnell, 5 Sam Skinner, 4 Marshall Sykes, 3 D’arcy Rae, 2 Ewan Ashman, 1 Pierre Schoeman.
Replacements: 16 Paddy Harrison, 17 Boan Venter, 18 Paul Hill, 19 Glen Young, 20 Freddy Douglas, 21 Ben Muncaster, 22 Charlie Shiel, 23 Harry Paterson.
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Benetton:15 Rhyno Smith, 14 Louis Lynagh, 13 Tommaso Menoncello, 12 Malakai Fekitoa, 11 Ignacio Mendy, 10 Jacob Umaga, 9 Louis Werchon, 8 Lorenzo Cannone, 7 Michele Lamaro (captain), 6 Alessandro Izekor, 5 Eli Snyman, 4 Niccolò Cannone, 3 Simone Ferrari, 2 Siua Maile, 1 Mirco Spagnolo
Replacements: 16 Bautista Bernasconi, 17 Thomas Gallo, 18 Giosué Zilocchi, 19 Riccardo Favretto, 20 John Bryant, 21 Andy Uren, 22 Giuliano Avaca, 23 Filippo Drago
Lions: 15 Quan Horn, 14 Eduan Keyter, 13 Henco van Wyk, 12 Richard Kriel, 11 Angelo Davids, 10 Chris Smith, 9 Morne van den Berg, 8 Francke Horn (captain), 7 Ruan Venter, 6 JC Pretorius, 5 Ruan Delport, 4 Etienne Oosthuizen, 3 Asenathi Ntlabakanye, 2 Franco Marais, 1 SJ Kotze
Replacements: 16 Morne Brandon, 17 RF Schoeman, 18 Conraad van Vuuren, 19 Darrien Landsberg, 20 Jarod Cairns, 21 Nico Steyn, 22 Sam Francis, 23 Manuel Rass
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Ospreys: 15 Jack Walsh, 14 Dan Kasende, 13 Phil Cokanasiga, 12 Keiran Williams, 11 Keelan Giles, 10 Dan Edwards, 9 Kieran Hardy, 8 Morgan Morse, 7 Harri Deaves, 6 Ross Moriarty, 5 Huw Sutton, 4 James Ratti, 3 Tom Botha, 2 Dewi Lake (captain), 1 Gareth Thomas
Replacements: 16 Lewis Lloyd, 17 Garyn Phillips, 18 Ben Warren, 19 Rhys Davies, 20 James Fender, 21 Reuben Morgan-Williams, 22 Tom Florence, 23 Iestyn Hopkins
Zebre Parma: 15 Giovanni Montemauri; 14 Lorenzo Pani, 13 Marco Zanon, 12 Enrico Lucchin, 11 Simone Gesi; 10 Martin Roger Farias, 9 Thomas Dominguez; 8 Giacomo Ferrari, 7 Iacopo Bianchi, 6 Guido Volpi, 5 Alessandro Ortombina; 4 Matteo Canali, 3 Matteo Nocera; 2 Giampietro Ribaldi, 1 Paolo Buonfiglio (captain)
Replacements: 16 Giovanni Quattrini, 17 Muhamed Hasa, 18 Juan Pitinari, 19 Franco Carrera, 20 Samuele Locatelli, 21 Nikolaj Varotto, 22 Luca Morisi, 23 Mirko Belloni.
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Glasgow: 15 Josh McKay, 14 Kyle Steyn (captain), 13 Ollie Smith, 12 Sione Tuipoluto, 11 Jamie Dobie, 10 Adam Hastings, 9 George Horne, 8 Euan Ferrie, 7 Macenzzie Duncan, 6 Gregor Brown, 5 Scott Cummings, 4 Alex Craig, 3 Fin Richardson, 2 Gregor Hiddleston, 1 Rory Sutherland
Replacements: 16 Johnny Matthews, 17 Patrick Schickerling, 18 Musphy Walker, 19 Alex Samuel, 20 Max Williamson, 21 Angus Fraser, 22 Ben Afshar, 23 Dan Lancaster
Dragons: 15 Huw Anderson, 14 Fine Inisi, 13 Andeurin Owen, 12 Harri Ackerman, 11 David Richards, 10 Jac Lloyd, 9 Che Hope, 8 Mackenzie Martin, 7 Harrison Keddie (captain), 6 Ryan Woodman, 5 Seb Davies, 4 Levi Douglas, 3 Dillon Lewis, 2 Oli Burrows, 1 Rodrigo Martinez
Replacements: 16 James Benjamin, 17 Dylan Kelleher-Griffiths, 18 Chris Coleman, 19 Matthew Screech, 20 Shane Lewis-Hughes, 21 Niall Armstrong, 22 tinus de beer, 23 Rio Dyer
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Leinster: 15 Jamie Osborne, 14 Jimmy O’Brien, 13 Robbie Henshaw, 12 Ciarán Frawley, 11 James Lowe, 10 Harry Byrne, 9 Fintan Gunne, 8 Max Deegan, 7 Josh van der Flier (captain), 6 Alex Soroka, 5 Ryan Baird, 4 Brian Deeny, 3 Tadhg Furlong, 2 Rónan Kelleher, 1 Paddy McCarthy
Replacements: 16 Gus McCarthy, 17 Jack Boyle, 18 Thomas Clarkson, 19 Diarmuid Mangan, 20 James Culhane, 21 Luke McGrath, 22 Hugh Cooney, 23 Joshua Kenny
Sharks: 15 Edwill van der Merwe, 14 Ethan Hooker, 13 Jurenzo Julius, 12 Lukhanyo Am, 11 Makazole Mapimpi, 10 Jean Smith, 9 Jaden Hendrikse, 8 Vincent Tshituka (captain), 7 Emmanuel Tshituka, 6 Phepsi Buthelezi, 5 Marvin Orie, 4 Jason Jenkins, 3 Ruan Dreyer, 2 Fez Mbatha, 1 Simphiwe Matanzima
Replacements: 16 Bongi Mbonambi, 17 Dian Bleuler, 18 Vincent Koch, 19 Bathobele Hlekani, 20 Nick Hatton, 21 Ross Braude, 22 Siya Masuku, 23 Francois Venter
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Cardiff: 15 Cam Winnett; 14 Jacob Beetham, 13 Harri Millard, 12 Steff Emanuel, 11 Tom Bowen; 10 Callum Sheedy, 9 Johan Mulder; 8 Alun Lawrence, 7 Dan Thomas, 6 Ben Donnell, 5 Teddy Williams, 4 Josh McNally, 3 Keiron Assiratti, 2 Liam Belcher (captain), 1 Danny Southworth
Replacements: 16 Daf Hughes, 17 Rhys Barratt, 18 Javan Sebastian, 19 George Nott, 20 Taine Basham, 21 Aled Davies, 22 Ioan Lloyd, 23 Osian Darwin-Lewis
Connacht: 15 Sean Naughton, 14 Chay Mullins, 13 David Hawkshaw, 12 Cathal Forde, 11 Shayne Bolton, 10 Jack Carty, 9 Ben Murphy, 8 Sean Jansen, 7 Sean O’Brien, 6 Cian Prendergast (captain), 5 Joe Joyce, 4 Darragh Murray, 3 Jack Aungier, 2 Dave Heffernan, 1 Denis Buckley
Replacements: 16 Eoin de Buitléar, 17 Jordan Duggan, 18 Sam Illo, 19. David O’Connor, 20 Shamus Hurley-Langton, 21 Matthew Devine, 22 Hugh Gavin, 23 Finn Treacy
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Ulster: 15 Jacob Stockdale,14 Rob Baloucoune, 13 James Hume, 12 Stuart McCloskey, 11 Zac Ward, 10 Jack Murphy, 9 Nathan Doak, 8 Juarno Augustus, 7 Nick Timoney, 6 David McCann, 5 Cormac Izuchukwu, 4 Iain Henderson (captain), 3 Tom O’Toole, 2 Rob Herring, 1 Sam Crean
Replacements: 16 Tom Stewart, 17 Eric O’Sullivan, 18 Scott Wilson, 19 Harry Sheridan, 20 Sean Reffell, 21 Conor Mckee, 22 Jake Flannery, 23 Jude Postlethwaite
Bulls: 15 Devon Williams, 14 Sebastian de Klerk, 13 Canan Moodie, 12 Harold Vorster, 11 Stravino Jacobs, 10 Handre Pollard, 9 Zak Burger, 8 Jeandre Rudolph, 7 Mpilo Gumede, 6 Marco van Staden, 5 Nicolaas Janse v Rensburg, 4 Cobus Wiese, 3 Wilco Louw, 2 Johann Grobbelaar (captain), 1 Gerhard Steenekamp
Replacements: 16 Juann Else, 17 Jan-Hendrik Wessels, 18 Mornay Smith, 19 Reinhardt Ludwig, 20 Nama Xaba, 21 Paul de Wet, 22 David Kriel, 23 Willie le Roux