Australia came from 34-13 down to beat Wales 39-34 in an extraordinary Autumn Nations Series Test at The Principality Stadium on Saturday which will pile the pressure on home coach Wayne Pivac.Two tries by Australia's 22-year-old wing and man of the match Mark Nawaqanitawase sparked the comeback which ended a three-match losing run on the tour including a historic defeat to Italy.The heartbreaking loss for the hosts could be a body blow to Pivac who ends the year with just three wins in 12 matches including a first ever defeat by Georgia last weekend.It was the hosts who settled their nerves as they raced into a 17-6 lead inside 23 minutes with two well worked tries.Alun Wyn Jones showed there is Test life left in the old legs as the 37-year-old lock produced a delightful offload to Jac Morgan, who ran over to touch down - Gareth Anscombe converted for 7-3.The Welsh extended their lead as a smooth passing move found veteran flanker Taulupe Faletau out on the right wing and he managed to get the ball down before he went into touch to mark his 100th Test for both Wales and the British and Irish Lions.Anscombe converted brilliantly from the touchline and then added another penalty for the hosts to lead 20-6 shortly before the half hour mark.Tempers were fraying on the Wallabies side as Len Ikitau had a few choice words with Ben Donaldson but Nawaqanitawase it was who offered them hope.The easy to spot wing with a mop of curls popped up in the centre and broke through the Welsh defence but the move faltered with a knock on.Nevertheless this new found confidence got its reward when Folau Fainga'a was forced over and Ben Donaldson converted to pull the visitors to within a converted try of levelling the game.However, they were