Cricket World Cup: Punters backing Aussie to win final

New Zealand Black Caps captain Brendon McCullum with Australian captain Michael Clarke before the pool match between Australia and New Zealand. Photo / Brett Phibbs.

Australia's odds of winning Sunday's World Cup Cricket final at the MCG have already firmed.

Punters have backed Australia from $1.45 into $1.42 at bookmaker WilliamHill.com.au, forcing New Zealand's odds to drift from $2.75 out to $2.90.

At New Zealand's TAB the Black Caps are slightly shorter as $2.60 outsiders while Australia remain the strong favourites at $1.45.

Infographic: How the Black Caps' odds shifted in the semi-final

"More than 75% of the money placed on the match so far is for the Aussies to win," said William Hill's Andrew Brown.

"We've already taken a mountain of four-figure bets for Australia but only seen a trickle of cash for New Zealand."

Steve Smith is the $3.75 favourite to be Australia's top run scorer, in front of David Warner ($4), Aaron Finch ($5) and Michael Clarke ($6.50).

Mitchell Starc is the $3 favourite to take the most wickets for Australia, ahead of Mitchell Johnson ($3.75), Josh Hazlewood ($4.50) and Pat Cummins ($4.50).

At the TAB Brendon McCullum is the $4.00 favourite to be New Zealand's top run scorer, ahead of Kane Williamson ($4.50), Martin Guptill ($5) and Ross Taylor ($6).

Trent Boult is the $2.75 favourite to take the most wickets for New Zealand, ahead of Tim Southee ($3.50).