Skipper Jones ruled out for Wales

The Ospreys number eight is nursing a calf muscle injury and will be replaced by Gloucester skipper Gareth Delve as one of three changes from the side beaten 26-20 by title favourites France last time out.

Flanker Martyn Williams will lead the side in Jones' absence, while there are starts for hooker Matthew Rees and lock Luke Charteris.

Rees, who makes his first start of this season's Six Nations after recovering from injury, replaces Huw Bennett and Charteris takes over from an injured Deiniol Jones.

On the bench, Dwayne Peel provides scrum-half cover for Richie Rees after Mike Phillips suffered a knock during Ospreys' Magners League defeat against Edinburgh two days ago and was not available for selection.

And there is a place among the substitutes for experienced Ospreys lock Ian Gough as Wales look to revive their Six Nations campaign after recording one win from three starts.

In-form Delve, meanwhile, wins a first Wales cap since the 2008 South Africa tour, and Williams captains Wales for the seventh time in his long Test career.

Wales coach Warren Gatland said: "Ryan has been managing his calf, but it has hampered his involvement in training.

"He needs to get it right for his own sake, as well as for his region, who have some big matches of their own coming up, and for the sake of the national cause as we count down to the World Cup.

"But it is an opportunity for Martyn, who is one of our key leaders, to captain Wales again and rise to that challenge after doing a good job against Scotland last year when Ryan was again forced to withdraw."