The NRL's Jack De Belin is expected to be hit with another criminal charge related to the alleged sexual assault of a woman in a Wollongong unit.

Police intend to lay a charge of assault occasioning actual bodily harm against the St George Illawarra Dragons' forward.

It's understood that relates to the same woman allegedly attacked and raped in the early hours of December 9.

Jack de Belin pictured arriving at court in Sydney yesterday where a judge agreed to fast track his fight to play rugby league. (AAP)

It will take the number of charges he is now facing to four.

His co-accused Callan Sinclair is expected to have the same charge added to his case.

The development emerged a day after De Belin notched up a small win in the Federal Court, where a Judge agreed to fast track his fight to play.

There will be a hearing in August of his appeal against last month's decision which effectively endorsed the NRL's no-fault stand down policy.

At the time of the judgement he released a statement in which he said he was disappointed.

"I am innocent and I will continue to vigorously defend the single charge made against me,” he said.