Former Sydney co-captain Brett Kirk says the Swans have not reduced their intensity despite losing two straight matches but will need more mental focus in their AFL clash with St Kilda at ANZ Stadium on Sunday.

The Swans suffered a shock 43-point loss to Richmond at the MCG last Sunday on the back of a much narrower one-point defeat against Essendon the previous weekend.

Kirk, awarded best and fairest for the Swans in their 2005 premiership-winning season, said the Swans showed great form against Essendon but dropped off mentally against Richmond, who were trying to end a six-game losing streak.

"I saw them play against Essendon, and was really proud of their performance in terms of their commitment and the intensity they showed," Kirk told AAP at the SCG on Wednesday.

"You don't lose that in a hurry.

"It's just that sometimes mentally you're not on, and they weren't on at the weekend."

Swans defender Ted Richards said his side's intent and lack of effort were responsible for the weekend defeat.

"It was really disappointing," Richards said.

"Monday was a pretty tough day.

"Now it's about moving forward and looking at St Kilda for this weekend."

"The Swans will be getting back to footy basics this week in training in the lead-up to their match against St Kilda and working on winning the ball in one-on-one contests," Richards said.

He said he wouldn't be surprised if there were team changes announced later in the week for the must-win match.

Kirk said the Swans traditionally thrive in finals-style matches and would be looking for a win against St Kilda to secure a possible finals spot.

"I'm confident they'll be back to where they were a couple of weeks ago," Kirk said.

"I'd imagine it will be all guns blazing come Sunday."

Brought to you by AAP © 2024 AAP