Broad is facing a minimum three-week ban for his sling tackle, which was assessed by the match review officer as careless conduct, high contact and severe impact.

The three-times premiership defender was not offered the chance for an early guilty plea.

Port Adelaide defender Ryan Burton also faces a two-match ban for his tackle on Collingwood forward Jamie Elliott.

Burton was also charged with rough conduct, but his incident was assessed as high rather than severe impact and this saved him from a direct referral to the tribunal.

Like Broad, Burton's tackle was rated as high contact and careless conduct.

Also on Sunday, North Melbourne co-captain Jy Simpkin was charged with striking Fremantle's Caleb Serong and was handed a one-game suspension.

Broad's certain suspension further stretches the Richmond back-line ahead of Friday night's blockbuster clash with Collingwood.

Robbie Tarrant and Josh Gibcus are already out injured, with games against the Western Bulldogs and Sydney to follow.

Following Richmond's 32-point win over Adelaide, coach Damien Hardwick conceded Broad was set for a stint on the sidelines.

"Nathan came and apologised to me and he will apologise to the young man (Parnell) as well," Hardwick said.

"No one goes out there deliberately trying to hurt a player, it's just in the heat of the battle.

"He (Broad) has got a duty of responsibility, he knows that and we understand that. So that will be dealt with during the week."

Australian Associated Press