Roosters halfback Mitchell Pearce suffered a hamstring injury against the Broncos.

The NRL has asked the Sydney Roosters for a report into an incident involving Mitchell Pearce.

A spokesman said the Integrity Unit was aware of the matter, aired on Channel 9 on Wednesday night, and has asked the Roosters to investigate.

"The Integrity Unit will work with the Roosters to ensure the matter is dealt with appropriately," the spokesman said.