To read full match previews and team news on the official Celtic League website, click here.
There are five games taking place evening, with four of our regional sides in action. The Scarlets and the Warriors battle in the match of the round tonight, while The Blues travel to play their capital rivals in Edinburgh, and The Dragons have a tough task as they take on the 1999 European champions Ulster at Ravenhill.
Tomorrow sees The Ospreys host current Celtic champions Munster at St Helens.
CELTIC LEAGUE 26/27/03
FRIDAY, 26 SEPTEMBER
7.05 Llanelli Scarlets v Celtic Warriors, Stradey Park
7.30 The Borders v Cardiff Blues, Netherdale
7.30 Ulster v Gwent Dragons, Ravenhill
7.30 Leinster Lions v Edinburgh Rugby, Donnybrook
7.35 Glasgow Rugby v Connacht, Hughenden
SATURDAY, 27 SEPTEMBER
5.30 Neath-Swansea Ospreys v Munster, St Helens