McFadden is expected to overcome an injured rib suffered during last week�s narrow loss to the Brisbane Broncos in Toowoomba, but Johnson is struggling to recover from a groin injury suffered during the same match.
�Andrew McFadden just had a little tear in his rib cartilage and has responded well to treatment, so he should be right to play this weekend,� Storm physiotherapist Matt Natusch said.
�We will continue to do some further tests on Dallas this week with his groin injury. He didn�t so much suffer a tear to the groin but it was jammed down on and therefore he may not have suffered an injury to the abductor tendon.
�We will have to wait and see how he progresses this week before making a decision on the Canberra match.�
Four key players who have been working to overcome groin injuries throughout the pre-season - Billy Slater, Stephen Kearney, Ryan Hoffman and Matt Orford - all got through Saturday night�s match without any concern.
Melbourne will travel to Wagga on Friday ahead of Saturday night�s match at Eric Weissel Oval - kick-off is at 6.30pm.