Williams, the world player of the year, missed Wales’ 23-15 victory over England at the weekend after injuring his ankle in the tournament-opening win against Scotland.

Henson has missed both games with a calf injury and although neither player will feature for the Ospreys this weekend they are set to be ready for Wales’ Friday night fixture in Paris.

Wales head coach Warren Gatland is expected to discover the results of Jamie Roberts’ precautionary shoulder scan within the next 24 hours.

Roberts suffered the injury two minutes from time in Wales’ bruising win against England at the Millennium Stadium.

“I am hoping it won’t be that serious,” Roberts said after the match.

“It was really hurting towards the end of the game. I was absolutely battered and bruised at the end and it was the toughest game I have ever played in.”

Gatland has released six players from national squad duty back to Magners League action this weekend.

The Ospreys will have Jonathan Thomas, who has recovered from shoulder problems, and Andrew Bishop available to face Connacht at the Liberty Stadium on Sunday.

Bradley Davies, Robin Sowden-Taylor and John Yapp return to the Blues for their clash with Glasgow while Rhys Thomas has been released to play for the Dragons against Ulster.

Scrum-halves Gareth Cooper and Dwayne Peel have both had to return to their Guinness Premiership clubs, Gloucester and Sale Sharks respectively.