Off-spinner Nathan Lyon says there are no dead rubbers as Australia chases a 5-0 whitewash of England in the 2021-22 Ashes.

Australia leads the series 3-0 after three dominant victories ahead of the fourth Ashes Test starting on Wednesday at the SCG.

There has been speculation about the make-up of the Australian side given they have already secured a series victory with dilemmas on Josh Hazlewood's fitness and Scott Boland's place along with talk of a second spinner in Mitch Swepson.

Lyon, who has taken 12 wickets in the three Tests, insisted Australia were determined to pursue victory and pick the best side possible.

"There's no more dead rubbers - and I've never considered them when you wear a baggy green - firstly because there's the World Test Championship and we want to go 5-0 up," Lyon told reporters on Sunday.

"If the conditions suit then we pick the best team to win that Test to make sure we keep moving forward. The Ashes for me is the pinnacle but I'd love to be part of a Test Championship final to state our case for the number one team in the world."

Australia missed out on the World Test Championship final last year, finishing third behind winners New Zealand and India. The Aussies have won the past two Ashes on home soil 4-0 and 5-0 respectively.

Lyon endorsed fellow spinner Swepson, who is set to get Test opportunities in 2022 with tours of Pakistan, Sri Lanka and India to come.

"I love bowling in partnership with spinners for sure," Lyon said. "I've done it a lot in subcontinent conditions so if the opportunity does come to play two spinners I know we'll really enjoy building that partnership. We've been doing it in the nets but it's a lot different."

Hazlewood, who has missed the past two Tests with a side injury, is expected to train fully with the group on Monday and could replace Boland who took 7-6 in the second innings of the third Test.