Australia captain George Bailey won the toss in overcast conditions and sent Sri Lanka in to bat in the last group match at the Oval in London on Monday. Sri Lanka will join hosts England in the semi-finals from group A if they win. Australia need a big victory to overtake New Zealand\'s run-rate and make the last four. India and South Africa are the semi-finalists from group B. Australia: George Bailey (capt), Shane Watson, Matthew Wade, Phillip Hughes, Adam Voges, Mitchell Marsh, Glenn Maxwell, James Faulkner, Mitchell Johnson, Clint McKay, Xavier Doherty. Sri Lanka: Angelow Mathews (capt), Tillakaratne Dilshan, Kusal Perera, Kumar Sangakkara, Mahela Jayawardene, Dinesh Chandimal, Lahiru Thirimanne, Nuwan Kulasekara, Shaminda Eranga, Rangana Herath, Lasith Malinga. Umpires: Marais Erasmus (RSA) and Tony Hill (NZL) TV umpire: Aleem Dar (PAK) Match referee: Javagal Srinath (IND) From: AFP