If teams are going to target me they will take their eyes of Lee, Nathan Wood and other players in he side

Asked if he felt it was right to sign the 31-year-old scrum-half for just the last few games of the season, the coach responded: "That's not my concern.

"Rules are rules and we are just smart enough to get there and do it. I would defy anyone who told me Andrew Johns should not be playing in Super League."

Johns will make his Wolves debut in Saturday's home clash with Leeds.

The Newcastle star trained with his new team-mates for the first time on Wednesday and was surprised at the way he had settled in quickly.

"We did some ball-work today and I was surprised how crisp it was," he said.

"Warrington play a similar style to Newcastle but it's just a case of getting used to the calls.

"The hardest bit will be forming a relationship with Lee Briers. It's all about sharing the ball around and working together."

Johns is one of three NRL players to have made the switch to Super League for the tail-end of the season.

Great Britain international and Sydney Roosters forward Adrian Morley has joined Bradford while Hull have snapped up New Zealand Warriors back-rower Sione Faumuina.

But Johns, twice voted the world's best player, is by far the most high-profile signing.

He expects to be singled out by opposition teams but says Warrington can only benefit.

"If teams are going to target me they will take their eyes of Lee, Nathan Wood and other players in he side," he said.

I take great pride in playing for Australia and I always love touring England Andrew Johns

"There is a lot of pressure on me but it's part of the excitement."

Johns also revealed he had got the backing of Australia coach Wayne Bennett to take up his stint in England.

Australia's opening Gillette Tri-Nations match against New Zealand in Sydney on 15 October clashes with the Super League Grand Final.

If the Wolves reach Old Trafford, Johns is prepared to temporarily turn his back on his country.

"I take great pride in playing for Australia and I always love touring England," said Johns, who has been named in Bennett's initial train-on squad.

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"I spoke to Wayne Bennett about it before I came and he was really positive about the opportunity.

"What would he rather me do, come over here and stay match-hardened or have five weeks to myself over there where who knows what I'd be up to?

"It's better to come over here and keep playing."