Sky Sports' experts review a thrilling weekend in the Rugby Championship and preview the epic finale.
The Ospreys joined Glasgow at the top of the RaboDirect PRO12 table after a 43-26 victory over Connacht in Galway.
Ospreys welcome back Justin Tipuric for their clash with Connacht, while Paul O'Connell is named on Munster's bench.
Paddy Jackson starred for Ulster with 13 second-half points helping the visitors beat Irish rivals Connacht 18-7.
Geoff Cross and Aleki Lutui will start their first Edinburgh match of the season against Ospreys at the Liberty Stadium.
Cardiff Blues claimed their first win of the season against Connacht thanks to the boot of young fly-half Rhys Patchell.
Round two of RaboDirect Pro12 begins with four Friday fixtures featuring Munster, Cardiff Blues, Ulster and the Dragons.
Connacht got the new season off to a promising start as they beat Zebre 25-16 at the Sportsground.
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