NRL | Newcastle Knights forward Lachlan Fitzgibbon says his combination with Kalyn Ponga will only improve.

HE has scored three tries already this season from Kalyn Ponga passes, and Knights back-rower Lachlan Fitzgibbon believes their combination will only improve.

The Ponga-Fitzgibbon joint venture has quickly become Newcastle’s most dangerous attacking threat, after short balls from the fullback have created tries for the back-rower against Canberra, Brisbane and Melbourne.

TRIES: Lachlan Fitzgibbon

TRIES: Lachlan Fitzgibbon

Fitzgibbon, who has emerged as genuine line breaker with nine tries in his past 11 games, says the more he plays alongside Ponga, the better they will get.

CREATIVE: Kalyn Ponga

CREATIVE: Kalyn Ponga

“We’re only rookies in the game,” the 24-year-old said.

“As it stands, I’m only about a 30-gamer and I think KP hasn’t even played 20 yet.

“Hopefully that combo sticks for a while now and we can play some good footy together.”

Fitzgibbon said he expected opposition teams would start to pay closer attention to the pair in defence.

“I think so, but as with any quality players, Kalyn is really hard to shut down,” Fitzgibbon said.

A stint in the sin-bin in Friday’s 40-14 loss to Melbourne took the gloss off a quality all-round display from Fitzgibbon.

"Lachy Fitz, he's a player that the level he reaches, Lachy will decide," Knights coach Nathan Brown said.

"I've had this conversation with Lachy a number of times in the past 18 months, and he's certainly making a lot more right decisions and he's certainly causing oppositions some trouble."