We kick off Round 4 with another Welsh derby; the winless Ospreys travel to Parc y Scarlets to play the undefeated Scarlets. Zebre v Ulster has been postponed following the tragic death of young centre Nevin Spence. Connacht travel to Scotland to face Glasgow, while Leinster host third-placed Edinburgh. The Cardiff Blues welcome Benetton Treviso to the Arms Park, while this weekends action ends in Limerick and Munster host the Newport Gwent Dragons.
Friday 21st September:
Postponed Friday 21st September:
(Rest in peace Nevin, Noel, and Graham Spence)
Friday 21st September:
Saturday 22nd September:
Saturday 22nd September:
Saturday 22nd September:
Friday 21st September:
Postponed Friday 21st September:
(Rest in peace Nevin, Noel, and Graham Spence)
Friday 21st September:
Saturday 22nd September:
Saturday 22nd September:
Saturday 22nd September: