Warren Gatland says he feels referees are not giving Wales the decisions they deserve during the Autumn Internationals.
Wales take on Australia in the final game of the series tomorrow.
A defeat would leave them out of the top eight in the world rankings and facing the prospect of a difficult draw for the next World Cup.
"This weekend's game is going to be big on several different levels" says former Welsh international Rhys Williams.
"We need a win to boost confidence within Welsh rugby. It's been a been a disappointing autumn campaign, and no one feels it more than the players."
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Showers expected throughout the day especially in the north. Drier and brighter elsewhere but cooler than in recent days.
Most places will become dry overnight, although it will remain generally cloudy with patches of hill fog.
Police have told people in Pontypridd that the cordon around the rugby club could be in place until next week.