The Magpies won by two points at Adelaide Oval on Saturday night to surge two games clear on top of the AFL ladder.
Rioli kicked one goal from 11 disposals and is set to face scrutiny from the league's match review officer over an off-the-ball strike on Nathan Murphy.
After the match, Rioli was subjected to racist abuse online, which Collingwood addressed in the early hours of Sunday morning.
"The Collingwood Football Club strongly condemns the abhorrent and disgusting racist remarks directed towards Willie Rioli," Magpies CEO Craig Kelly said in a statement.
"There is no room for racism in our game and we will not tolerate it - not on the field, off the field or online.
"All of us have a responsibility to call out this behaviour and our Club is committed to playing a role in educating as many members of the wider community as possible.
"We stand alongside all First Nations players, staff and supporters."
Collingwood has been in contact with the AFL integrity unit and Port Adelaide over the incident.
The AFL has been contacted for comment.