Phil Hughes became the first Australian to score a century on his one-day international debut as he powered the side to a 107-run win over Sri Lanka yesterday.
Hughes hit 112 and stand-in captain George Bailey struck 89, before David Hussey smashed 60 not out off 34 balls to turn a good total into a commanding 305-5 on a flat Melbourne Cricket Ground wicket.
Dinesh Chandimal kept Sri Lanka in contention with a belligerent 73, but four wickets from Clint McKay and some superb fielding, including three run-outs, restricted the tourists to 198 in reply.
Victory ended a three-match losing streak against Sri Lanka at the Melbourne Cricket Ground.
Australia, who won the Test series 3-0, lead the five-match ODI series 1-0 with the second game tomorrow in Adelaide.
Sri Lanka could be without Chandimal for that game after the wicketkeeper, one of the few success stories of a one-sided Test series, had to have repeated on-field treatment to what looked like a hamstring problem.
His mobility steadily decreased after he had his thigh bandaged.
However, Australia can be happy with the way an inexperienced line-up coped without rested captain Michael Clarke and the omitted Mike Hussey.