Gatland: Half-backs key to defeating familiar foe

Warren Gatland readily admits there is "a very strong rivalry" between Wales and Ireland as they prepare for their latest Six Nations showdown.



Wales will end Irish Grand Slam hopes if they triumph at the Millennium Stadium on Saturday, while also keeping themselves in the title shake-up ahead of next week's final round.



Ireland have only lost twice in Cardiff, though, since 1983 and they are currently 10 games unbeaten under head coach Joe Schmidt, including successive Six Nations victories this season over Italy, France and England.



"The players know each other so well and there is…