The Ospreys are in Heineken Cup action this lunchtime at Northampton Saints.
Their supporters will be hoping for a better performance than last week's home defeat to Leinster.
It will be a tough challenge though. The Saints lost their opening Heineken Cup game but are second in the Aviva Premiership.
Meanwhile the Scarlets were held to a 26-26 draw at home to Racing Metro last night despite leading 26-10 at halftime.
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Aaron Ramsey has told his English team-mates at Arsenal to beware Wales overtaking them in the FIFA rankings.
Plenty of fine dry weather to come today and prolonged spells of sunshine. A cool easterly breeze will take the edge off the temperatures.
The three-day event in the Welsh capital is expected to attract more than 20,000 visitors.