A defiant Paul McGregor insists he will pick Jack de Belin as soon as next week if he's able to successfully challenge the NRL's no-fault stand-down policy in the Federal Court.

De Belin's immediate future will be decided in a three-day hearing due to start on Monday as his high-powered legal team challenge the NRL's validity of standing down players on serious criminal charges.

Jack de Belin will be picked for the Dragons if his court case is successful, says coach Paul McGregor. Credit:Adam McLean

The NSW representative has trained throughout the opening five weeks of the season in the hope of returning to the field after the court case, which could pave the way for his return in the Dragons' clash with the in-form Sea Eagles in Wollongong next weekend.

St George Illawarra has strung together three straight wins - including a 40-4 hiding of the struggling Bulldogs at Netstrata Jubilee Oval on Sunday - and McGregor said he would have no hesitation to rush de Belin straight back into a winning side if successful in the courts.