Swans sweat on Bolton

It might not grab the headlines like Gary Ablett's knee injury but the Sydney Swans have some fitness concerns of their own in the wash-up of their 70-point win over the Gold Coast on Saturday night.

Throwing their pre-match plans into chaos, veteran Jude Bolton was a late withdrawal from the match after dramatically injuring his knee in the warm-up.

Given the 31-year-old's reputation for being hard at it, Sydney coach John Longmire's ears pricked up when he heard Bolton complain of soreness.

"When Jude says that you really listen because he's such a tough nut," he said.

"That doesn't happen too often to a bloke like Jude. I'm hoping it's OK."

Longmire will find out when he has scans early this week - but Bolton's last-minute exit gave an opportunity to his replacement, Luke Parker, and he took it with both hands.

"He had about five minutes (to prepare for the match). He got himself organised and he was fine," Longmire said.

"I think he ended up having 25 possessions and kicked two goals - he's a quality kid who contests really hard and wants to improve."

"We were wrapped that he got the opportunity and did so well."

Sydney kicked 15.16 (106) for the night - a marked improvement on their last outing a week ago against Adelaide at AAMI Stadium.

They kicked 6.14 (50) that night and their ability to straighten up in front of goal was pleasing for Longmire but he knows there is far more room for improvement from the Swans.

"It was an improvement on last week. We can still get better at it," he said.

"We still had some relatively easy shots today that I thought we could have made a bit more of."

"There are a lot of things we can get better at after that game, looking at it."

"We won by 70 points, which doesn't happen too often in league footy - it's still pretty hard to do."