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The NRL is this week expected to decide whether any clubs have breached the new rules on concussion after requesting explanations from Canterbury, Parramatta and Penrith over incidents in the opening three premiership rounds.
NRL officials will also look closely at whether the Bulldogs could have got prop James Graham from the field quicker in Saturday night's 40-12 defeat of Melbourne in Perth after the former English captain aggressively waved trainers away before coming from the field for a concussion assessment.
Graham returned 12 minutes later but commentators were questioning whether he should have remained on the field after appearing to have suffered another head knock before scoring a try in the 60th minute.
The NRL receive the results of all concussion tests done on the sideline by club doctors but has already asked Canterbury for further information after second-rower Josh Jackson continued playing in the round two match against Cronulla at ANZ Stadium.
The Eels have been asked to provide a report about why centre Will Hopoate did not come from the field in their opening match against the Warriors, while there were questions about how long it took for Panthers trainers to get hooker James Segeyaro off in their round two clash with the Storm.
Penalties for ignoring the new rules range from the loss of competition points, a substantial fine or the suspension of registration of key personnel.
It is unclear whether Graham will be required to undergo further concussion testing before being cleared to play against Sydney Roosters at Allianz Stadium on Friday night.
Bulldogs co-captain Frank Pritchard is in severe doubt for the match after sustaining an ankle injury in the win in Perth and is expected to be sidelined for several weeks.
Wests Tigers should also know more on Monday about the fitness of halfback Luke Brooks and interchange forward Sauaso Sue after both suffered ankle injuries in Saturday's 42-18 loss to the Warriors in Wellington.
Fullback James Tedesco and second-rower Cory Paterson also failed to finish the match with concussion.
Tigers coach Mick Potter said he was worried when Paterson, who had the words "Rise for Alex" written on his wrist, landed awkwardly on his head but described the tackle from Sione Lousi as an accident.
‘‘It was serious enough for him not to come back on, his head got in a bad place,’’ Potter said. ‘‘It’s always a concern when there’s a bad tackle, that’s just the nature of the game. Sometimes there’s accidents that just happen.’’
Warriors utility Jerome Ropati suffered a broken jaw and is expected to be sidelined for 12 weeks, while forward Feleti Mateo has a knee injury but is expected to be fit for Saturday's match against Cronulla at Remondis Stadium.