Six Nations 2015: Ireland are Wales' biggest rivals - Williams

Former Wales winger Shane Williams believes Ireland have usurped England as his nation's biggest rivals ahead of this Saturday's Six Nations game in Cardiff.

Grand Slam-chasing Ireland have a two-point lead over England and Wales in the table with two rounds of matches to play.

Williams, who retired in November 2014, says beating Ireland is a "big scalp" while former Ireland winger Denis Hickie thinks the fixture always has "good bite".

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Watch live coverage of Wales v Ireland on BBC One and this website from 14:00 GMT on Saturday 14 March, plus relive the best moments of the Six Nations on BBC Two from 19:00 GMT on Sunday 22 March.