Overnight wrap: Origin, Souths,

The NSW and Queensland State of Origin sides will wrap up their preparations for tomorrow night's series decider with a final run at Melbourne's Telstra Dome this afternoon.

The closed sessions will be the one and only hit out at the match venue for either side throughout their Origin build-up. With the match being the first under the closed roof for many of the players, both sides are understood to have asked for the roof to be closed for today's sessions. Telstra Dome officials have said they will only close the roof if conditions are not sunny due to concerns over the amount of sunlight getting to the grass.

Queensland will also hold a shootout during training today to determine which of their five goal kickers will be given the added responsibility tomorrow night.

In the NRL, Bulldogs prop Roy Asotasi has declared South Sydney a genuine semi-final contender next season after signing a $2.2 million deal to join the Rabbitohs for the next five years.

Asotasi ended speculation about his future by signing with Souths until the end of the 2011 season despite offers from Wests Tigers, Sydney Roosters and several UK clubs. The New Zealand forward said the embattled club could go from the wooden spoon to a top eight team following the addition of big names Dean Widders, Nigel Vagana and David Kidwell to its 2007 roster.

Elsewhere, the Sydney Roosters have shifted their round 22 NRL clash with Newcastle from Aussie Stadium to Gosford's Bluetongue Central Coast Stadium.

The Roosters attracted their biggest home crowd of last season when they shifted their match against Canberra to the Central Coast ground and are hoping for a similar turnout for the August 6 encounter.

The club says the move is an opportunity to promote rugby league in regional areas.