ROUND 4
| Sat 7 Mar 2020 | 14:15 | Ireland v Italy | Aviva Stadium, Dublin, Ireland | Nic Berry (RA) | Angus Gardner (RA) | Karl Dickson (RFU) | Graham Hughes (RFU) |
| Sat 7 Mar 2020 | 16:45 | England v Wales | Twickenham Stadium, England | Ben O’Keeffe (NZR) | Romain Poite (FFR) | Alex Ruiz (FFR) | Marius Jonker (SARU) |
| Sun 8 Mar 2020 | 15:00 | Scotland v France | Murrayfield, Edinburgh, Scotland | Paul Williams (NZR) | Wayne Barnes (RFU) | Frank Murphy (IRFU) | Brian MacNeice (IRFU) |
ROUND 5
| Sat 14 Mar 2020 | 14:15 | Wales v Scotland | Principality Stadium, Cardiff, Wales | Angus Gardner (RA) | Nic Berry (RA) | Karl Dickson (RFU) | Rowan Kitt (RFU) |
| Sat 14 Mar 2020 | 17:45 | Italy v England | Stadio Olimpico, Rome, Italy | Pascal Gauzere (FFR) | Andrew Brace (IRFU) | Alex Ruiz (FFR) | Brian MacNeice (IRFU) |
| Sat 14 Mar 2020 | 21:00 | France v Ireland | Stade de France, Paris, France | Wayne Barnes (RFU) | Paul Williams (NZR) | Mike Adamson (SRU) | Marius Jonker (SARU) |