Wales beat an Ireland side that played with 14 men for over an hour 21-16 in a gripping Six Nations contest in Cardiff on Sunday. Irish flanker Peter O'Mahony was shown a straight red by referee Wayne Barnes after he elbowed Tomos Francis in the head. Victory nevertheless will be welcome for Wale coach Wayne Pivac who came into the match under immense pressure following a disappointing first year in charge. pi/dj