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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