Update: 6:51PM MELBOURNE Storm's backline depth is set to be severely tested with Justin O'Neill and Sisa Waqa both facing lengthy injury lay offs.
Scans have shown O'Neill has a small fracture in his ankle.
O'Neill will consult with a surgeon on Monday to discuss the best course of action and whether surgery is required.
While Waqa will also miss three to four weeks after aggravating an old ankle injury.
The Fijian will undergo a minor arthroscope next week.
It compounds Melbourne's woes after Friday night's frustrating 16-10 loss to NZ Warriors at AAMI Park.
Storm has the week off for the representative round before facing archrivals Manly at AAMI Park on Saturday week.