The Swans' last Grand Final triumph seems so long ago for Jetta that he admits he has forgotten what it feels like to win a premiership.
"I want that feeling back," he said.
"I'm a relaxed bloke and I'm getting excited (about Saturday). I got excited just watching the other games - Port Adelaide and Hawthorn, Geelong and North.
Jetta was the Swans' leading goalkicker in 2012 with 45 majors.
But things have changed since star forwards Lance Franklin and Kurt Tippett arrived at the club.
He currently sits 10th on Sydney's list of scorers with just 14 goals - 61 fewer than Coleman medallist Franklin.
"There's a couple of times where I've missed some easy goals," the 25-year-old said.
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"I should've kicked a lot of goals - some were set shots, some were on the run, right in front and I missed it.
"But my main focus was the defensive side of my game - being clean in ground balls, taking on tackles and giving it off to my teammates. And using my feet in the scramble and stoppages.
"That's what I've been working on all year, and that was my focus at the start of pre-season.
"And it's been working for me.
"Now, if the goals are there I try and kick them. If not, I'll kick it to Tippett, Buddy or Goodes.