Paul Gallen eyeing Sonny Bill Williams fight after fourth-round knockout

Paul Gallen has called for Sonny Bill Williams to meet him in a super bout of football stars after the Cronulla hardman took his boxing record to 7-0.

Gallen scored an impressive victory over Gold Coast-based Kiwi Ryan Carr-Ketu with a fourth round knockout at Southern Cross Group Stadium on Friday night.

The 35-year-old will retire from the NRL at the end of the 2017 season and is hoping to meet New Zealand cross-code star Williams in a fight later next year.

"I'm going back to footy now, I've got two weeks off and then I've got a big season ahead of me," Gallen said.

"Then this time next season we'll weigh it up.

"We want to do it (a fight with Williams), everyone wants to see it so let's make it happen.

"It's got to the stage where it's got to happen. I'm not planning on having too many more fights."

After a bitter lead-up in which the two fighters engaged in a war of words, Friday's bout was often spiteful with Carr-Ketu leading with his head on several occasions.

He was warned a few times by the referee and Gallen accused Carr-Ketu of headbutting at least four times.

"He headbutted all the time, by the end he was leading with his head," Gallen said.

"But I got the win and that's what I care about."

Gallen came out to a hero's welcome at his NRL side's home ground, following Carr-Ketu's verbal jibes in the lead up.

Carr-Ketu insulted the Shire and referred to Gallen as "the head bogan", as well as making reference to the Sharks peptide scandal, none of which endeared the adopted Queenslander to the parochial crowd.

Carr-Ketu controlled the early going, using his superior reach to land a couple of nice lefts.

However, from there it was all Gallen who stood and delivered a flurry of big blows, to which his opponent couldn't respond.

Newshub.