Kangaroos prop David Klemmer has declared the "sky's the limit" for Knights twin brothers Daniel and Jacob Saifiti following their booming start to the season.
And he wouldn't rule out the possibility of both staking a genuine claim for NSW Blues selection at the end of the season.
"I know it's a long way off but nothing's out of the question for them," the Knights pack leader said.
"Both of them, Daniel and Jacob, they are going great. They have put a whole heap of work in over the past year or so and I couldn't be more proud of them.
"In the off season and pre-season as well, they've looked after themselves and trained really hard and they are reaping the benefits now because they are playing some really good footy."

Daniel was outstanding in a man-of-the-match performance on Thursday night in Gosford against Brisbane where he clearly out-pointed current NSW prop Payne Hass and Blues hopeful Matt Lodge. It prompted Knights skipper Mitchell Pearce to suggest Saifiti is right up there among the best props in the game right now.
He scored a crucial try through sheer will-power and desire early in the second half and ran for 217 metres from 19 hit-ups in just 51 minutes.
Jacob came off the bench and continued his barnstorming start to the season, working in tandem with his brother and making big metres with every charge.
It's little wonder coach Adam O'Brien has made him the club's number one retention target with the 24-year-old coming off contract at the end of the season. Klemmer believes individual honours for all Knights players will take care of themselves if the side continues to improve.
"As a team, we need to keep winning and improving and the individual stuff will take care of itself," he said.
"We knew the Broncos have a really strong forward pack and if we gave them a lot of ball, they would hurt us. Our aim was to hold the footy and put pressure on them.
"We probably gave them a couple of opportunities but overall, I thought we did a really good job in the middle. But that's not to say we can't get even better. That's the good thing. There is still plenty of room for improvement in our side."
Klemmer, who may have been over-shadowed by Daniel Saifiti on the night, still ran for 190 metres and it was his off-load that directly led to the Knights' opening try to Kurt Mann.
The late off-load has been a feature of his game this season under O'Brien but he says he doesn't go into tackles with the pre-meditated idea of getting the ball away.
"It's more a case of sometimes being able to get my arms free because under the new rules, there are probably less bodies in the tackle and you've got a little bit more freedom,"he said.
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Pearce said Brisbane has a "big young pack with plenty of talent" but thought his Knights forward pack dominated them.
"They did a great job on them and Daniel was the leader of that," he said. "He's been outstanding.
"He's only 24, some front-rowers don't come into their own until mid or late 20s and he's already played Origin and he's improving every year.
"He's turning into one of the better front-rowers in the game."
Knights players have been given the weekend off and have a long turn around leading into next Saturday's clash against the Cowboys in Townsville.
Five-eighth Kurt Mann, one of his side's best against Brisbane, scoring a try and laying on another with a kick for Hymel Hunt, left the field midway through the second half complaining of tightening in his hamstring but is not expected to be in danger of missing the Cowboys game.
Key forward Mitch Barnett, who is on the comeback trail following neck surgery, is likely to see his surgeon next week in a bid to get the all clear to return.
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