Castres Olympique v Enisei-STM (17:00 GMT) and Brive v Zebre Rugby Club (19:00 GMT) are being screened on Friday night as well as Pau v Cardiff Blues (20:00 GMT) and Dragons v Worcester Warriors (20:00 GMT), with a further four matches confirmed for Saturday.

You can take your pick from Bordeaux-Begles v Agen (13:00 GMT) and Rugby Calvisano v Leicester Tigers (13:30 GMT) on Saturday afternoon, with Scarlets v Bayonne (19:45 GMT) and Stade Francais Paris v Bristol Bears (20:00 GMT) following on Saturday night.

Please note that Scarlets v Bayonne is unavailable in the UK on EPCR TV but can be seen on S4C, while Stade v Bristol can be watched on BT Sport in the UK and FR4 in France, but not on the stream.

To register for the matches, please click HERE.

Further announcements will be made prior to Round 4.

EPCR TV will again have coverage of several Challenge Cup Round 4 ties this weekend, live and free to watch on ChallengeCupRugby.com.