Keith Earls seals Ireland win over Australia to complete big-three sweep

• Ireland 27-24 Australia• Ireland gain memorable win in DublinAustralia arrived here hoping that they were about to take another step towards a grand slam tour, the only previous completion of which was in 1984. Next weekend at Twickenham they will play England with that target off the table. They came back from 17-0 at half-time against Ireland – the same score as two years ago here – to lead in the third quarter, only to be overhauled again by a hugely spirited home side. For Ireland it completed a hat-trick over the big three of South Africa, New Zealand and Australia in this calendar year…