Brad Fittler admits the Sydney Roosters look like they're suffering from a State of Origin hangover.

The problem for Fittler is, like most hangovers, there is no magic cure.

"Obviously State of Origin has had a bit of an impact," said Fittler when asked why the Roosters were off the boil following successive defeats.

"You wouldn't like to think so but it appears that way.

"We've come back from Origin and whether it's our game plans or whether it's our attitude or fatigue or fitness we've dropped two games.

"We will just put the head down and work pretty hard."

The Roosters have suffered successive defeats to the Gold Coast and Canberra and Fittler is now staring down the barrel of three straight defeats for the first time in his short coaching career.

The Roosters host red-hot Manly at the Sydney Football Stadium this Sunday and Fittler knows the pressure is on to turn around the club's flat form immediately.

"I feel the pressure every week," he said.

"It's a challenge, I just wake up and have another crack.

"We've hit a couple of hurdles and we have to make sure we're going to bounce back.

"I'm not worried at all. What we've done at the start of the year is put ourselves in a great position and at the moment there is a couple of teams going better than most others and we've got some room to improve and we have to look at that.

"It is a test and against the best side too. I think it's a test for our team and club and fans as well. We have to put it all into one week."

The challenge Fittler has put to the club's fans is a call to arms for a bumper 20,000 plus crowd at Sunday's crucial clash.

It's a battle between two top four sides and Sydney's two best hopes at premiership glory in 2008 and Fittler wants the SFS at least half full.

"We're playing the team coming first and the best team in the comp at the moment," said Fittler.

"Hopefully we can get 20,000 people."

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