Mahendra Singh Dhoni smashed his career's fifth century to power India to 354 for seven against Australia in the second One-day international cricket match in Nagpur today Gautam Gambhir contributed 76 and Raina 62 off 50 balls . Sehwag added 40 and Yuvraj Singh 23.Earlier, Australia won the toss and elected to field.The visitors lead seven match series one nil after their four run victory in Vadodara on Sunday.