Sri Lanka must beat Australia to revive their tri-series finals hopes and the home side has had plenty to consider this week, with controversy over the scheduled tour of Pakistan and the inaugural Indian Premier League player draft.
Australia have also chosen to rest star paceman Brett Lee for Friday's match, but Jayawardene said that didn't mean an easier outing for Sri Lanka.
"I've played Australia quite a few times and they don't take any game lightly,' Jaywardene said.
"That's why they've been so consistent over the last so many years, they don't relax at all.
"Any side which they put out there tomorrow, you have to play really well to beat them."
Jaywardene has repeatedly claimed in recent weeks that the home side was struggling for form, but Australia still head the tri-series table on 17 points, with India on 12 and Sri Lanka last on six.
Sri Lanka have lost both their matches against Australia and Jayawardene admitted his side needed to find a way to match the intensity of the home side.
"Even though they've had a few guys who have not been in form, they are still top of the table," he said.
"They still work really hard to make sure they get their wins.
"I think the other two teams have to put a lot of work in and try and pick up our game."
Australian captain Ricky Ponting, who has been one of the players struggling with the bat, said his team would be meeting on Thursday to clear the air over the off-field issues and ensure they maintained focus.
"We all flew in from our home states this morning, so we'll get together down here and just clear the air a bit," he said.
"I'm pretty sure the coach will make sure that that happens.
"We've probably had enough distractions over the last few weeks anyway with all this stuff in the background and a lot going on."
The IPL draft on Wednesday was topped by India's one-day captain Mahendra Singh Dhoni, followed by Australian Andrew Symonds.