Australian UFC heavyweight Tai Tuivasa reckons an escape from his friends and a prolonged absence from the pub has him primed to end a four-bout losing run in his showdown with Jairzinho Rozenstruik.

UFC 305 mania has hit Perth ahead of Sunday's middleweight title bout between champion Dricus Du Plessis and Israel Adesanya.

Another big bout expected to get the sellout crowd off their feet will be Perth-born Steve Erceg's flyweight battle with New Zealand's Kai Kara-France.

Tuivasa (15-7, 14KOs) is also set to be well supported by the crowd at Perth Arena when he enters the octagon.

The 31-year-old, affectionately known as Bam Bam, hasn't tasted victory since defeating Derrick Lewis in February 2022.

But a training stint in Dubai has Tuivasa feeling confident about ending his losing streak when he takes on Rozenstruik (14-5, 13KOs) in what is set to be an explosive affair.

"I'm definitely probably the best I've felt," Tuivasa said.

"I've been back over in Dubai. I've got a lot more focus when I'm over there.

"No bad influences, no friends, I just kind of lock in and stay away from the pub."

Tuivasa's past two fights have ended in submission losses — the most recent being against Marcin Tybura in March — and he's keen to avoid more wrestling.