Misbah-ul-Haq's equal-fastest century humiliates Australia in second Test Stumps day four: Australia 4/143 requiring a further 459 runs. Australia is on the verge of one of its heaviest ever defeats against Pakistan as records tumbled on another day of humiliation for the visitors. Barring an epic display of stonewalling by the lower order on Monday, Australia will plunge to their first series loss to Pakistan in 20 years, their sixth Test defeat on the trot in Asia and second whitewash in as many years on the continent. Punished: Misbah-ul-Haq decimated the Australian attack. On a red-letter day for Pakistan cricket, Misbah-ul-Haq equalled the fastest century in Test history as his team treated the No.2 Test nation with utter contempt. Yet again, they outbatted, outbowled and outfielded Michael Clarke's men. Australia struggled to 4-143 at stumps on the fourth day in pursuit of Pakistan's mammoth target of 603. Australia's batsmen again had great difficulty combating the left-arm finger spin of Zulfiqar Babar, who claimed three wickets - including the key scalp of Michael Clarke for five. The only meaningful resistance has come from David Warner, who made 58, and fifth-wicket pair Steve Smith and Mitchell Marsh, who have added 42 after surviving much of the last session. It has been a horror series for the Australians. With one day left, they have posted only one century to Pakistan's nine - the most Australia has conceded in any series. Their bowlers have claimed just 21 wickets in four innings compared to Pakistan's 34. Defiant: David Warner offered some resistance with the bat. There was more pain for them on Sunday. Centuries to Misbah and Azhar Ali meant it was only the second time in Test history two players from the same side have made a ton in each innings, following in the footsteps of Ian and Greg Chappell at Wellington in 1974. The pair are the eighth and ninth Pakistanis respectively to score centuries in each innings of a Test. Lonely figure: Australian captain Michael Clarke is sent to the sheds after another disappointing innings. Misbah had been dropped on four by Peter Siddle, who missed a straightforward chance off Steve Smith. Playing with the freedom granted by a 309-run first innings lead, Pakistan sped along at six runs an over against an Australian attack which seemed to be waiting for a declaration to put them out of their misery. Nor was Australia helped by the absence of Mitchell Johnson, who was nursing a sore hip, though there was no point asking their best quick to play the role of a bowling machine. Smith and Mitchell Starc copped the brunt of the attack from Misbah. He reached his ton with back-to-back boundaries against Starc. Australia made a terrible start to their run chase, losing the wickets of Chris Rogers and Glenn Maxwell in the 13 overs before tea. It completed a terrible match for Rogers, who, like many of his teammates, has been found out by spin. Maxwell fared marginally better with scores of 37 and four though the cavalier manner in which he plays has caused alarm. On Sunday he was nearly bowled on his eighth ball playing a reverse sweep. So much for seeing out the first 40 balls, which the side has deemed vital to prosper in these conditions. Clarke fell cheaply for the third time in four innings, bowled playing down the wrong line to a ball from Babar which spun away from him and crashed into his middle and off stumps.