Mahendra Singh Dhoni produced a gigantic six in the last over as India broke Australia's stranglehold by snatching a nail-biting four-wicket victory over the hosts in the ODI tri-series on Sunday. After restricting Australia to 269 for eight built largely around David Hussey's 72, the visitors overcame some jitters before overhauling the target with just two balls to spare in a dramatic last over to record their second successive win in the tournament. Gautam Gambhir (92) led the way with an assured knock at the top of the order and the finish was provided by the reliable duo of Suresh Raina (38 off 30 balls) and Dhoni (44 not out) as the visitors chased down the record target of 270.