Melbourne forward Danny Williams' NRL judiciary hearing will remain adjourned until August 4 after attempts to move it forward a week "became impractical".

The NRL on Tuesday said the decision was made after judiciary chairman Greg Woods held a phone hook-up with Williams' NRL club the Storm and the judiciary counsel Peter Kite.

Williams' case was adjourned a fortnight after the judiciary called for further medical evidence to support the defence's claim the forward was suffering from "post-traumatic amnesia" when he struck Wests Tigers forward Mark O'Neill.

But NRL CEO David Gallop was keen to have the hearing brought forward a week to limit the damage to the game from the growing hysteria over the Williams hit.

"Attempts to bring the adjournment date forward became impractical when Melbourne confirmed that it would not be in a position to present its final medical evidence until next week," an NRL spokesman said.

Meanwhile, the deferred high tackle charge against O'Neill will be heard by the NRL judiciary Wednesday night.

The case was held over from last Wednesday as O'Neill overcame the side affects of a "king hit" by Williams.

O'Neill will not miss a match even if found guilty of a grade one careless high tackle on Williams, as the penalty does not accrue enough points to warrant a one-match suspension.

Melbourne's Alex Chan Tuesday pleaded guilty to a grade one reckless high tackle and was suspended by the NRL for four weeks.

Chan went high on Parramatta's Nathan Hindmarsh in the 50th minute of Melbourne's last gasp 22-16 win at Olympic Stadium last Saturday night and was facing up to six weeks on the sidelines if he fought the charge at a judiciary hearing and lost.

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