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Here are the teams for Saturday's games!
Ireland: Hugo Keenan; Mack Hansen, Garry Ringrose, Stuart McCloskey, James Lowe; Johnny Sexton (c), Jamison Gibson-Park; Andrew Porter, Dan Sheehan, Finlay Bealham; Tadhg Beirne, James Ryan; Peter O'Mahony, Josh van der Flier, Caelan Doris.
Replacements: Rob Herring, Cian Healy, Tom O'Toole, Iain Henderson, Jack Conan, Conor Murray, Ross Byrne, Bundee Aki.
Wales: Liam Williams; Josh Adams, George North, Joe Hawkins, Rio Dyer; Dan Biggar, Tomos Williams; Gareth Thomas, Ken Owens (c), Tomas Francis, Adam Beard, Alun Wyn Jones, Jac Morgan, Justin Tipuric, Taulupe Faletau.
Replacements: Scott Baldwin, Rhys Carré, Dillon Lewis, Dafydd Jenkins, Tommy Reffell, Rhys Webb, Owen Williams, Alex Cuthbert.
England: Freddie Steward; Max Malins, Joe Marchant, Owen Farrell (c), Ollie Hassell-Collins; Marcus Smith, Jack van Poortvliet; Ellis Genge, Jamie George, Kyle Sinckler, Maro Itoje, Ollie Chessum, Lewis Ludlam, Ben Curry, Alex Dombrandt.
Replacements: Jack Walker, Mako Vunipola, Dan Cole, Nick Isiekwe, Ben Earl, Ben Youngs, Ollie Lawrence, Anthony Watson.
Scotland: Stuart Hogg; Kyle Steyn, Huw Jones, Sione Tuipulotu, Duhan van der Merwe; Finn Russell, Ben White; Pierre Schoeman, George Turner, WP Nel; Richie Gray, Grant Gilchrist; Jamie Ritchie (c), Luke Crosbie, Matt Fagerson.
Replacements: Fraser Brown, Jamie Bhatti, Simon Berghan, Jonny Gray, Jack Dempsey, George Horne, Blair Kinghorn, Chris Harris.