- Pool 3Round 1Full timeSat, 9 Dec 2023 - 15:15Stade Pierre-Fabreepcrugby.tv / FloRugbyCastres Olympique34Scarlets16
- Pool 3Round 2Full timeSat, 16 Dec 2023 - 13:00Hive StadiumViaplay / Premier Sports / beIN SPORTS / FloRugbyEdinburgh Rugby34Castres Olympique21
- Pool 3Round 3Full timeSat, 13 Jan 2024 - 15:15Stade Pierre-Fabreepcrugby.tv / beIN SPORTS / FloRugbyCastres Olympique28Black Lion6
- Pool 3Round 4Full timeFri, 19 Jan 2024 - 20:00KingsholmViaplay / Premier Sports / beIN SPORTS / FloRugbyGloucester Rugby35Castres Olympique5
- Round of 16Full timeFri, 5 Apr 2024 - 19:00KingsholmViaplay / Premier Sports / beIN SPORTS / FloRugbyGloucester Rugby30Castres Olympique25