Melbourne Storm forward Felise Kaufusi has been condemned by fans over an incident that wiped Parramatta rival Ryan Matterson out of Thursday night's match.
Parramatta made an early-season statement after a Maika Sivo double powered them to their first win over an almost full-strength Storm side in nine years.
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Sivo scored the Eels' first and last tries in a gripping 16-12 victory, with his match-winner coming three minutes from fulltime at Bankwest Stadium.
However, the Eels had to scrap to victory in the rain-soaked conditions down one player on the bench, after Matterson was knocked out in a first half tackle from Kaufusi, in which the Storm player's forearm made contact with the Eels forward's head.
Kaufusi was lucky to stay on the field after being placed on report for the tackle that resulted in a concussion for Matterson
The Storm forward appeared to use his forearm to slam the Eels player to the turf.
He now faces up to a three-game ban after being hit with a grade-two charge but could miss just two games if he fights the charge.
Matterson, who has a long history with concussions, remained on the ground for several minutes before being taken from the field.
The Eels' edge man failed his HIA and did not return.
Fox Sports commentator Greg Alexander said he had no doubt the contact from Kaufusi caused the concussion for Matterson.
“I thought he came over the top with the forearm and I thought that played a part in the damage that has been done to Ryan Matterson,” he said.
Eels coach Brad Arthur later admitted he thought the rules stated Kaufusi should have been sin-binned for the incident.
"I thought that's what would happen, but it didn't so we just have to move on," Arthur said.
Viewers were left outraged by the incident, insisting that the NRL need to come down hard on Kaufusi if they're serious about addressing concussion concerns.
Eels break hoodoo against Storm
Sivo sealed the Eels win with a double but wasn't the only hero for Parramatta, whose only wins against Melbourne since 2012 have been in State of Origin rounds or with the Storm's big guns rested.
"It's one game," Arthur said.
"It's great. If we want to be the team that they are and challenge, we need to make sure we do that every week.
"It doesn't matter who we play. We need to have the attitude of that's how we play. I'll be happy if we do that every week."
Mitch Moses kicked brilliantly and Clint Gutherson defended superbly, making three try-savers playing on a heavily-strapped left ankle.
His first was on a hard-running Nelson Asofa-Solomona as he attempted to barge over the line, before he later stopped Tui Kamikamica.
The fullback's effort on Cameron Munster before halftime was the pick of the night, hitting the ball out of the five-eighth's hand.
Junior Paulo also threatened to score his second match-winner in six days when he charged across with 12 minutes to play, breaking a 6-6 deadlock.
After the Storm had been stuck at their own end for the majority of the second half, their weary defence finally let go.
But the visitors hit back back six minutes later when a Ryan Papenhuyzen kick bounced back into his own legs before Justin Olam picked it up and scored.
That only allowed Sivo to seal the match-winner though, when he took a 30-metre kick from Moses in front of George Jennings and charged over.
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