Cronulla's controversial win over Canberra caused headlines after the officials got a crucial try decision wrong.

Greenberg said referees have to be accountable.

“We should be getting those decisions right, they impact games, they impact livelihoods," he said.

"We have got to get better.The competition is close, margins are close … it means every decision matters. You can take it as read that tomorrow’s appointments will reflect some of that disappointment.

"There has to be accountability, that’s across the board, including me. You can expect there will be accountability taken tomorrow [when referees' appointments are announced].

"If you are not in good form or you want to improve your performance you need to work hard, you have got to make sacrifices and you have got to continue to improve your performances.

"That’s the measurement I have given our [referee’s] coaches today; work harder, get better and let’s reduce the errors."