Adam Gilchrist and Damien Martyn bludgeoned centuries in a devastating partnership that left Australia in complete control of the second Test with New Zealand on Sunday.Martyn made a career-best 165 while Gilchrist belted 162 to help Australia post a daunting first innings total of 570-8 declared.New Zealand crashed to 122-4 in reply at stumps on the third day and facing the likelihood of having to bat for another two days just to save the Test.Gilchrist said Australia were supremely confident of victory after New Zealand crumbled to lose last week’s opening Test by nine wickets inside four days.“Pressure is an amazing thing,” Gilchrist said.“We’ve got a lot of runs on the board, we’ve got a batting line-up that has crumbled against our attack last week.”Glenn McGrath did the early damage with the ball, trapping New Zealand captain Stephen Fleming lbw for a golden duck after he failed to offer a shot, then dismissing the in-form Hamish Marshall for 18, caught by Jason Gillespie at long leg after a mistimed pull shot.Brief scoresAustralia: 570-8 decl (D.Martyn 165, A.Gilchrist 162, S.Warne 50 n.o, Franklin 4-128, Vettori 2-170) vs New Zealand: 122-4 (C.Cumming 37, L.Vincent batting 38, McGrath 2-31).