The alleged incident occurred in the early hours of Sunday morning following the Magic Millions.

He has been accused of grabbing the woman from behind and causing pain to her neck and was subsequently removed from premises by security.

The woman told The Courier Mail the pull was “forceful”.

“He came up from behind me and pulled my hair quite hard and yanked my head back,” she said.

“I had a sore neck all day yesterday.”

It is the latest in a string of off-field incidents involving the 23-year-old.

Roberts was fined $20,000 by the Broncos for abusing a female staff member in a drunken bender at a Brisbane pub.  

He was last year suspended for kicking an opposition player who was on the ground.

Roberts was let go by South Sydney in 2011 after a series of incidents including smashing a taxi window.

He was sacked by Penrith in March 2014 for off-field woes.

The 23-year-old woman is reluctant to make an official complaint.