Wale and Scotland ring changes as Ritchie ruled out

Wales boss Wayne Pivac has handed Ospreys flanker Jac Morgan a Test debut in Saturday's Guinness Six Nations clash against Scotland, as both sides ring the changes.

Scotland flanker Jamie Ritchie has been ruled out for the rest of the Six Nations with a hamstring injury.

The 25-year-old went off in the second half of last weekend's victory over England, and the Scottish Rugby Union confirmed, while announcing the team to face Wales in Cardiff on Saturday, that his campaign is over.

Morgan, 22, replaces Ellis Jenkins in one of four Welsh changes and lines up at openside flanker in a reshaped back-row that also sees Ross Moriarty start at number eight instead of Aaron Wainwright, with Taine Basham wearing the number six shirt.

Elsewhere, Morgan's Ospreys colleague - wing Alex Cuthbert - makes a first Six Nations appearance for five years, being preferred to Johnny McNicholl.

But Cuthbert's fellow wing Josh Adams, who started at outside centre in last Saturday's Six Nations opener against Ireland in Dublin that Wales lost 29-7, is ruled out because of a tight calf muscle, so Owen Watkin fills the number 13 position.

Pivac has resisted any temptation to make further changes, while captain Dan Biggar makes his 100th Test match appearance for Wales and the British and Irish Lions, becoming the ninth Welshman to achieve that feat.

Biggar wins a 97th Wales cap, with Wainwright among the replacements, but McNicholl and Jenkins, who skippered Wales in Autumn Nations Series games against Fiji and Australia this season, drop out completely.

Scotland have not won in Cardiff for 20 years, losing eight Six Nations Tests, a World Cup warm-up game and an autumn international during that time.

But they will arrive at the Principality Stadium