It alleged Hayne assaulted a female victim in the Hunter Valley area which lies north of Sydney, on the night of the NRL Final (September 30).
Goodbye, Jarryd Hayne. I hope you think long and hard about what you've done-20 years in jail will be good for that.
According to NSW Criminal Code, a sexual assault becomes "aggravated" if the offender inflicts "actual bodily harm on the alleged victim intentionally".
Police allege the assault of the 26-year-old woman took place in a Hunter region home on September 30.
"Detectives from the Child Abuse and Sex Crimes Squad arrested a 30-year-old man at Ryde Police Station just after 4pm today (Monday 19 November 2018)".
The woman initially made a complaint to the NRL Integrity Unit, which passed the matter into NSW Police.
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The pair allegedly had sex at the location and the woman claims she suffered injuries during the encounter.
Police investigated the incident but decided not to charge Hayne.
Jarryd Hayne is a professional rugby league footballer who most recently played for the Parramatta Eels in the NRL.
He has also played American football, running out of the San Francisco 49ers in late 2015, and rugby union sevens at the highest levels.
This isn't the first time that Hayne has been accused of sexual assault.
No charges have been laid at this stage, though Channel Nine's Danny Weidler says he in the process of being charged with aggravated sexual assault.