Schmidt defends Ireland’s aerial tactics with Australia series still up in the air

• Head coach says approach to counter Israel Folau is legal• Australia’s Michael Cheika: ‘Everything on the line’ in final TestAustralia expect the series against Ireland, which is locked at 1-1 going into the final Test at a sell-out Allianz Stadium in Sydney, to be decided in the air.The Wallabies won the first match after their full-back Israel Folau dominated the aerial battle in Brisbane but Ireland devised a way of reducing his effectiveness in Melbourne last week, although Australia felt it was not by means entirely within the laws. Related: Nick Phipps and Lukhan Tui in for Australia's…