The world on their shoulders

With only two months until the World Cup each team's preparations should be ready for the final polish. However, the three sides contesting the month-long CB Series, which starts with Australia facing England at the MCG on Friday, still have many experiments to complete as they countdown to the Caribbean.

Australia seem to have less to worry about than England or New Zealand and they already benefit from the momentum built from the Ashes whitewash and the rust-shaking limited-overs win in Tuesday's Twenty20. Despite the smooth progression through the first half of the season, Ricky Ponting's outfit is still tinkering with its bowling attack and the No. 4 spot while Matthew Hayden is due to return to the unstable opening slot opposite Adam Gilchrist.

Michael Clarke will nestle into the spot behind Ricky Ponting following the retirement of Damien Martyn and the move will be crucial in giving him more time in the middle following shifts lower down the order. "We think that's a really well-balanced side then with Clarke at four, Andrew Symonds five, Michael Hussey six, that sort of line-up," Ponting told AAP. "[Clarke] has been dying to get a chance up the order, his chance has come now." In this team of powerbrokers he must perform almost immediately or risk being shifted by the might of Symonds or Hussey.

Brett Lee has a chest problem and will miss his second match in a row, giving some of his younger rivals a chance to settle. Ben Hilfenhaus, the swing bowler, has joined the squad but Ponting said he would miss the opening affair along with Brad Hogg, allowing Mitchell Johnson and Cameron White opportunities alongside Glenn McGrath and Stuart Clark.

Ponting has outlined his starting plans but the tactics of his initial opponents are in such doubt even the team management must be unsure of their preferred line-up. Michael Vaughan is back as captain and trying to lift a squad that has struggled for the past two months.

"That's our biggest challenge - to make sure we get them in a good mental state for Friday," Vaughan said in the Sydney Morning Herald. "We realise it's going to be tough but when tough times come about you need tough people, and that's what we need from all the players."

Tough talkers: Michael Vaughan and Andrew Flintoff are two key men for England © Getty Images

Questions remain over Vaughan's recovery from a knee injury and there are doubts over whether to choose Paul Nixon or Chris Read as wicketkeeper. Andrew Flintoff is also a concern as he attempts to recapture the all-round form that deserted him when he led the Test side to a 5-0 loss. The batting order is noticeably stronger with Vaughan at the top, but the bowling is less assured even if Monty Panesar gets a chance to prove himself in what should be his debut series.

England have 16 players in their squad but the options don't drip with class and if they reach the three-match finals they should be considered a success. They managed only five wins in 20 ODIs last year and one of those was against Ireland. Australia succeeded in 20 of 29 games in 2006, including the Champions Trophy final, while New Zealand started the year by drawing a five-match series with Sri Lanka.

New Zealand enter the tournament on Sunday against Australia at Hobart and they will try out a squad without three of their regulars. Stephen Fleming's side, which was dismissed for 73 on Saturday, has landed in Tasmania missing Scott Styris, Jacob Oram and Kyle Mills, who may appear in the squad if they recover.

However, they do have Shane Bond, who has 24 wickets against Australia in seven games, and he will attempt to scare the local batsmen during the four preliminary encounters. Each team plays eight matches in the qualifying round before two progress to the finals in what could be the last season of the three-team format.

Australia Adam Gilchrist (wk), Matthew Hayden, Ricky Ponting (capt), Michael Clarke, Michael Hussey, Andrew Symonds, Cameron White, Brad Hogg, Brett Lee, Nathan Bracken, Stuart Clark, Mitchell Johnson, Glenn McGrath.

England Michael Vaughan (capt), Andrew Strauss, Ian Bell, Kevin Pietersen, Andrew Flintoff, Paul Collingwood, Jamie Dalrymple, Ed Joyce, Paul Nixon (wk), Chris Read (wk), Jon Lewis, Sajid Mahmood, Monty Panesar, James Anderson, Liam Plunkett, Chris Tremlett.

New Zealand Stephen Fleming (capt), Nathan Astle, Peter Fulton, Hamish Marshall, Craig McMillan, Brendon McCullum (wk), Andre Adams, Ross Taylor, Daniel Vettori, Shane Bond, James Franklin, Mark Gillespie, Jeetan Patel, Michael Mason.