Sydney returned to the winner's list but were left fuming after star midfielder Luke Parker was interfered with by Port Adelaide's Matthew Broadbent as he was about to receive medical treatment.
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The Swans posted what coach John Longmire described as one of the club's best wins of the year but the victory was marred by the "unnecessary" attention Parker received from Broadbent in the third quarter.
It followed a tackle from Jay Schulz which left defender Ted Richards unconscious. The incident is likely to come under the scrutiny of the AFL's match review panel.
Broadbent attempted to push Parker over as the Swan was about to receive medical treatment after copping a bump to his leg.
The confrontation was similar to the controversial treatment St Kilda's Nick Riewoldt received from Brisbane pair Mal Michael and Chris Scott after injuring his shoulder in a game in 2005.
An angry Lewis Jetta ran out of his way to confront Broadbent, who was subsequently jeered by the partisan Swans crowd.
Broadbent was also rebuked by Longmire, who normally refrains from commenting on the opposition.
"It was unnecessary," Longmire said.
"It's not for me to comment but I thought Luke's response in the last quarter was fantastic."
Parker had nine of his 26 possessions in the last quarter.
Port Adelaide coach Ken Hinkley said he did not see the incident.
Longmire hailed the victory as one of the Swans' finest considering they were missing Lance Franklin and Kurt Tippett then lost Gary Rohan and Ted Richards to injury.
Richards was knocked out after his head hit the turf in a tackle from Jay Schulz.
Richards was stretchered off the field but was said to be in good spirits after the game - however his availability for Sunday week's game against Brisbane is not known.
But Rohan is set for a spell on the sidelines after injuring a hamstring. The injury has come with Rohan in hot form.
"He has been really good. His pressure in our forward half has been good all year," Longmire said.
"He's added in the last few weeks the ability to kick goals and set up goals and mark the ball. He's starting to hit some really strong form."
Longmire was pleased with youngster Toby Nankervis's performance on debut, particularly his ability to dig deep and run out the game after Sydney's injuries.
"I thought he was pretty good, he competed well. He knows where to go and he's an old fashioned footballer. When the ball's in his area he makes you earn it. He knows where to run," Longmire said.
