Brisbane Broncos captain Adam Reynolds has been forced from the field to undergo a Head Injury Assessment after being involved in a heavy collision with Greg Marzhew.

Reynolds was unable to continue after the incident, with the Broncos skipper immediately sent for an HIA as a precautionary measure in line with the NRL's concussion protocols.

The development is a significant concern for Brisbane, with Reynolds one of the team's most important players in his role as captain and halfback. The extent of any injury remains unclear, with the HIA process to determine whether he is able to return to the field.

Further updates on Reynolds' condition are expected as the match progresses.