Sydney, Feb 18 : Senior umpires, Daryl Harper and his South African colleague Rudi Koertzen, have embraced the move to allow players to challenge decisions, as Australian players prepare to exercise the right for the first time during the Test series against the Proteas.

The results of the trial will determine whether the review system is adopted permanently, although England and Wales Cricket Board chairman Giles Clarke has already indicated he does not want it used for the Ashes series.

Clarke argues that the review system, where players can challenge an umpiring decision by making a T-sign with their arms, undermines the authority of the on-field adjudicators, a claim supported by former Australian coach John Buchanan.

However, Australian umpire Daryl Harper and South African colleague Rudi Koertzen, who are currently officiating for England's tour of the West Indies, have rejected the criticism.

"The objective of the review system is to eliminate the obvious errors," the Sydney Morning Herald quoted Koertzen, as saying.

"Inevitably there will still be decisions that people will argue are wrong but that is not really the point of the system. Statistics from the trial so far show the system is getting rid of mistakes," he added.

For the current England tour, the International Cricket Council altered the trial to allow each team two unsuccessful challenges an innings rather than the original three, to discourage frivolous appeals.

"The amount of time taken depends on the specific decision and on the amount of information that must be reviewed to get the full picture," said Harper, who, as the third umpire, was hampered by problems with his TV screen in the first Test.

Buchanan, however, is fiercely opposed to the concept of players challenging umpires' authority, arguing it sends the wrong message and umpires should instead be provided with greater support, resources and training. (ANI)