This season's annual tri-series involves Australia, England and New Zealand, but the tournament format has been criticised for being too long and suffers in popularity when the home side is not involved in the finals.

There have been suggestions that Australia play both touring nations in separate one-day series, spread either side of the domestic Test matches.

Cricket Australia (CA) chief executive James Sutherland said the organisation was assessing the format of the one-day series in conjunction with talks with broadcaster Channel Nine, and studying attendance figures.

Sutherland was unable to say whether the same triangular format, a staple of Australian summers since the late Kerry Packer introduced the concept in 1979-80, would be kept for the 2008-09 season.

CA is locked in to host a tri-series in 2007-08, meaning the earliest a change could be made would be for the 2008-09 season.

India and Sri Lanka are scheduled to tour Australia in 2007-08, and the matches between those sides will reap the CA millions of dollars in broadcast rights from the cricket-infatuated subcontinent.

"What we've said before is that we continue to look at ways in which our traditional program -- and not just one-day international cricket but Test cricket and Twenty-20 cricket -- can evolve and change so we can satisfy our customers' needs," Sutherland told reporters Thursday.

"That's what really is important to us, that cricket fans continue to get content in the appropriate format.

"In terms of how that might look in the future, who knows?"

This (southern) summer's series starts with Australia playing England at the Melbourne Cricket Ground on January 12, after the five-Test Ashes series.