Manly's Lottoland could lose Saturday's home final against Cronulla after asbestos were found on the hill, according to The Sydney Morning Herald.
A safety assessment will be conducted on Monday, with the potential to move the game to Bankwest Stadium.
The NRL will withhold ticket sales for 24 hours.
NRL boss Todd Greenberg said the safety of fans was the number one priority.
"Our number one priority is ensuring the safety of our players and fans. Unfortunately it could not be guaranteed when the schedule was confirmed," Greenberg said.
"We have given the local council and the Sea Eagles a period of grace of 24 hours in order to assess the safety of the venue before we release tickets.
"We have worked with Northern Beaches Council and the Sea Eagles to ensure the club is given the opportunity to host a Final, while ensuring the safety of our supporters is paramount."
Iโve got corporate tickets to this, itโs upset inspector Ben Lewis but hey who likes refs anyway! On ya bike Benny boy
If the NRL think manly fans will travel to Bankwest they’ve got rocks in their heads
I call bulsh1t on this one.
Just like when the Kogarah grandstand reportedly had Concrete Cancer……………….sorry Dousty, no one fell for that one
Brookie cleared, sit on that one Ben blewis, hey christo you to la lalalala la la