SYDNEY coach Dean Cox has acknowledged the heartbreak of his side's narrow late-game defeat to Fremantle, admitting it was difficult to balance pride in the group's late-season resilience with the devastation of missing out on a Grand Final.

While giving credit to the Dockers, Cox highlighted that Grand Final berths are rare and hard-earned, a reality felt most acutely by the club's veterans, even as younger players gain invaluable experience.

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"It's hard to say it's a missed opportunity when you play a really good footy team," he said after Sydney's loss to Fremantle.

"Prelims are big games, and there's a lot at stake because there's a Grand Final next week. 

"We missed the opportunity to take those moments to put ourselves in a Grand Final, and that's why everyone's really disappointed. 

"The older players certainly understand that they don't just come around every year. Some of the young ones are thinking, 'How good is it to be a part of it? I'm learning everything, and I'll grow from playing in them.' But they're hard to get to. That will settle in over the next few days; that we missed an opportunity to put ourselves into a position to play in a Grand Final. But we should also be really proud of finishing second on the ladder, hosting a prelim, and just falling short."

Sparked by a Shai Bolton's move forward and a dominant 44–30 clearance edge, Fremantle pulled off a thrilling fourth-quarter comeback to defeat Sydney by 12 points, completely turning the game by dominating the final-term inside-50s (23–6), clearances (12–5), and contested possessions (49–27).

Trailing by 21 points at the final change, Fremantle surged with five unanswered goals, capped by a go-ahead set shot from Mason Cox, holding the Swans goalless as they overran a tired, depleted Sydney side to book their place in the Grand Final.

Cox explained how the visitors took control late through momentum and relentless pressure around the contest.

"I think to Freo's credit, they ramped up towards the back end of the third," he said.

"They kicked a goal at three-quarter time and then at the start of the last, certainly around the contest, they played a front-half game. We were in a really, really good position for three and a bit quarters, but at this time of year you can't give a team any momentum, and they took it.

"They just outnumbered us. Then when we blasted it out of our back half, they got the repeat entries, and they took their moments. That's what good teams do. They've been the best team all year, and it showed that you've got to play a full 120 minutes against those teams to get the result you're after."

Veteran defender Dane Rampe, acting as stand-in skipper with Callum Mills sidelined, appeared devastated at the final siren. 

The 36-year-old, who resumed the captaincy after being re-drafted as a rookie late last year, left the SCG in tears while acknowledging the crowd. 

While neither Rampe nor the Swans have decided on his playing future, the door remains open for him to play on, given Mills could miss the entire 2027 season following recent ACL surgery.

Cox lauded the leadership of Rampe, praising his impact both on-and-off the field. 

"I can't speak highly enough of what Dane has done for our football club ever since he's been here," Cox said. 

"He's a club favourite; he's a fan favourite. The way he goes about his football, the way he prepares. His emotional intelligence is as high as I've seen.

"He leads really strongly and, unfortunately, we couldn't get it done for him."

Cox said that discussions regarding Rampe's future would take place in due course, emphasising that the former co-captain has "earned the right to get through this year" before any decisions about his future are finalised.

Earlier, in the third term, Tom Papley appeared ginger after having his legs taken out by a sliding Karl Worner while picking up the ball on the run.

Unable to get going, he limped off for attention on his right knee before having it strapped up and returning to the field. 

Cox acknowledged that missed umpiring calls were part of the game, but he underscored the vital importance of player safety.

"One thing we'll always try to do is make sure you protect the player going for the ball," he said.

"Taking someone's legs out isn't something that you like to see, but those are just decisions that get made on the move."