St Helens coach Mick Potter believes his Kiwi forward Tony Puletua can turn the Super League leaders into an invincible force after they crushed Castleford 68-22.

Potter was beaming after Sunday's win, in which they produced some of their best play of the season in a 12-try rout.

Puletua, a close-season signing from Penrith, shone brightest in the one-sided display and scored three of his four tries in the first 23 minutes.

"He is a pleasure to watch but I would hate to be standing in front of him," Potter said.

"He has been tremendous for us and the guys around him are appreciating playing with him. He leads by example every week. He is a good talker and a good leader, he's everything you want in a new recruit."

Struggling Bradford, second from bottom with just five points all season, are next up for Saints.

Potter is fearing no one after his side opened up a four-point lead over their nearest rivals and reigning champions Leeds Rhinos.

"I don't think we've been better all season than we were during moments against Castleford," he added.

Justin Morgan's Hull KR continued their solid start to the season with a comeback win over Harlequins on Sunday.

And it's all down to trust, according to their youthful 33-year old coach.

"You do not coach to tell players what to do, you coach them to make the decisions for themselves," he said.

"The selection of plays that they made were the right ones for the appropriate times."

Bradford coach Steve McNamara admitted he was embarrassed by his side's 58-22 capitulation against struggling Warrington.

Former Manly full-back Chris Hicks scored 30 points for the Wolves as he ran in three of Warrington's ten tries at Odsal Stadium.

Bradford have won just two Super League games all season and have now suffered back-to-back defeats since beating Leeds Rhinos on Good Friday.

McNamara said: "It's like having your teeth pulled out with no anaesthetic. It can be a cruel game at times.

"We put in a very flat performance, which is very unlike us. It is not nice to concede that many points and at home that is an embarrassing scoreline."

Hull FC coach Richard Agar admits it was a case of deja-vu for his side as they let a half-time lead slip to lose 21-14 against Wakefield.

Mark Calderwood and Mike Burnett had given Hull a 10-8 half-time advantage before John Kear's men produced a second-half comeback.

Agar said: "I feel like I'm saying the same things every week.

"Unfortunately the errors we are creating at the moment are having a deflating effect on the team.

"You can see the body language of some of the boys when they happen. It's hurting us badly."

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