Australia produced an excellent all-round display to beat Pakistan by 140 runs in Sydney and take a 2-0 lead in their five-match one-day series. Shane Watson scored 69 at almost a run a ball and Cameron White hit 55 as Australia posted 267-6. Doug Bollinger removed Salman Butt and Younus Khan and 7-2 became 71-7 as Pakistan's batting order collapsed. Mohammad Yousuf scored 58, but he was ninth out, caught by Nathan Hauritz off Clint McKay (3-15), in Pakistan's 127. Pakistan's hopes of chasing down the total were effectively ended by a fearsome opening spell from Bollinger (2-19) and Peter Siddle (1-23). Both Butt and Younus were caught by White at second slip while Siddle bowled Umar Akmal to leave Pakistan 32-4. Umar's elder brother Kamran was earlier run out by a brilliant piece of fielding by McKay off his own bowling. Ricky Ponting then produced a sensational one-handed catch to dismiss Shoaib Malik off the bowling of McKay. Shahid Afridi hit a six in his brief stay at the crease while Rana Naved also smashed two maximums as he scored 27 off 22 balls. But his aggression also proved his downfall when he was stumped by Brad Haddin attempting to launch Hauritz out of the stadium. McKay claimed the prize wicket of Yousuf and had Saeed Ajmal caught behind to finish with career-best figures. Earlier, Watson and Shaun Marsh put on 100 runs for the first wicket in entertaining fashion after being asked to bat by Yousuf, the former stroking nine boundaries and one six. White picked up where he left off in Brisbane Friday, scoring 55 off 57 deliveries and he was ably assisted in the middle order by Michael Clarke (25) and Mike Hussey (29) before Haddin's late flurry of 27 off 14 balls boosted the total. Scores: Australia 267-6 beat Pakistan 127 by 140 runs. Lanka, Australia in semis An aggressive 79 from rising Sri Lankan star Banuka Rajapaksa carried his side to an overwhelming 146-run victory over South Africa in their ICC Under-19 Cricket World Cup quarterfinal in Auckland Sunday. Sri Lanka now plays Australia in the second semifinal Wednesday with giant-killer Pakistan playing the West Indies in the first semifinal Monday. Australia qualified with a 62-run win over New Zealand Sunday. Man of the Match Rajapaksa belted 10 fours as he top-scored for Sri Lanka with 79 off 78 balls and put on 91 in 16 overs for the third wicket with fellow left-hander Rumesh Buddika at Lincoln Green. Danishka Gunathillike added an unbeaten 24 from 16 balls at the tail of the innings as Sri Lanka posted 293-8 from 50 overs. South Africa was two wickets down by the seventh over, when rain stopped play and a revised target of 292 in 49 overs was set. After play resumed Josh Richards (46) and Colin Ackerman (21) put on 50 in 56 balls for the third wicket. But the fall of Ackerman in the 16th over triggered a collapse from which South Africa never recovered and it was all out for 145 after 36.4 overs with medium-fast Charith Jayampathi taking 4-31. At Rangiora, Australia batted first against New Zealand and scored 232-8 with skipper Mitchell Marsh top scoring with 53. New Zealand launched a cautious reply, reaching 26 without loss in 10 overs before Jason Floras made the breakthrough when he bowled Harry Boam who had made just six from 27 balls faced. New Zealand was eventually all out for 170 in the 44th over, 62 runs short of their target.