ROUND FOUR:
| taly v Wales Stadio Olimpico, Rome Satuday, 11 March, 2023 | Referee: Damon Murphy (RA) Assistant Referee 1: Karl Dickson (RFU) Assistant Referee 2: Chris Busby (IRFU) TMO: Joy Neville (IRFU) |
| England v France Twickenham Stadium, London Saturday, 11 March, 2023 | Referee: Ben O’Keeffe (NZR) Assistant Referee 1: Jaco Peyper (SARU) Assistant Referee 2: Andrea Piardi (FIR) TMO: Brett Cronan (RA) |
| Scotland v Ireland BT Murrayfield, Edinburgh Sunday, 12 March, 2023 | Referee: Luke Pearce (RFU) Assistant Referee 1: Wayne Barnes (RFU) Assistant Referee 2: Christophe Ridley (FFR) TMO: Stuart Terheege (RFU) |
ROUND FIVE:
| Scotland v Italy BT Murrayfield, Edinburgh Saturday, 18 March, 2023 | Referee: Angus Gardner (RA) Assistant Referee 1: Matthew Carley (RFU) Assistant Referee 2: Craig Evans (WRU) TMO: Brett Cronan |
| France v Wales Stade de France, Paris Saturday, 18 March, 2023 | Referee: Nic Berry (RA) Assistant Referee 1: Andrew Brace (IRFU) Assistant Referee 2: Christophe Ridley (FFR) TMO: Joy Neville (IRFU) |
| Ireland v England Aviva Stadium, Dublin Saturday, 18 March, 2023 | Referee: Jaco Peyper (SARU) Assistant Referee 1: Ben O’Keeffe (NZR) Assistant Referee 2: Pierre Brousset (FFR) TMO: Marius Jonker (SARU) |
