"There will be an additional overlay of resources there to ensure that game is run smoothly.
"In simple terms it is an overlay of staff so it will be an additional overlay of NSW police."
Greenberg said it would be at least another week before those who threw bottles would be identified and subsequently punished.
"There were some discussions yesterday, between the authorities, police, the stadium, the club and the NRL. I understand they will be sifting through more vision, both broadcast and CCTV," he said.
"We are very hopeful of first of all identifying the culprits who threw bottles, and then after that imposing sanctions to those people or utilising the rules and putting bans in place.
"Clearly when we find those people who did the wrong thing we will come down hard on them.
"We haven't identified anyone as yet, we are working hard to do that.
"As you can imagine there is a crowd of 40,000 and we are trying to hand-pick individuals. It is not a simple exercise so it it may take some time."
- AAP