Penrith turned tonight's grand final rematch into a replay at Telstra Stadium - and coach John Lang believes his side is still improving.

The Panthers dominated the Sydney Roosters from start to finish at the scene of their October heroics, winning 22-6 in a performance which left no doubt as to who now wears the tag of premiership favourite.

Electrifying fullback Rhys Wesser, without a try heading into the match, clicked into form with a double to open his tally for the season, five-eighth Preston Campbell out-shone Brad Fittler and the Penrith pack bashed the Roosters where they've made their name - up the middle.

"We are becoming a really top class, professional football side," Lang said.

"If we play in the high range of our ability we're going to be hard to beat no matter who we play. That first 40 minutes in defence and attack I thought we were tremendous. We could have had a couple more tries."

The Roosters, on the other hand, finished the match with plenty of problems.

Second rower Craig Fitzgibbon injured his knee and is likely to miss a month, joining international teammates Shannon Hegarty, Craig Wing and Jason Cayless on the sidelines and Adrian Morley finished the match on report for a high tackle on Craig Gower in the first half.

Another Roosters player could also be in trouble over an incident which left Penrith forward Luke Swain without two of his teeth.

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