Australia opened their World Cup with an emphatic win as all-rounder Mitchell Marsh claimed five wickets after Aaron Finch smashed an aggressive century to key a 111-run victory over on Saturday. Finch made 135 and Glenn Maxwell (66) and captain George Bailey (55) posted half centuries in front of a crowd of more than 84,000 at the Melbourne Cricket Ground to guide through an early collapse and to a total of 342-9. Chase barely got started before Mitchell Starc (2-47) claimed the wicket of Moeen Ali (10), then Marsh (5-33) ran through the top order. In a bizarre end to the match, James Taylor (98 not out) had an lbw decision overturned on review, only for James Anderson to then be ruled run out at the other end.