rate head Mitchell Starc is in formation to return to Australia's wheeling formation-up with ordinal maker Ashton Agar unlikely to compete in Thursday's closing residues try-out against England. 

Captain Steve Smith expressed Starc was "ready to go" after wheeling this week in the nets after missing the moved ordinal Melbourne experiment with an injured bottom. 

"Starcy has pulled up pretty well this morning and he says he's ready to go. I guess that's a good indication," Smith expressed communicators on Wednesday. 

Agar's possibilities of competing in his ordinal experiment, wheeling in rotate placement with Nathan Lyon, have also been rated with additional grass on the Sydney Cricket object pitch. 

"The wicket's got a fair bit of grass and looks to be a pretty good wicket," Smith expressed. 

"I'd say we'll probably opt for just the one spinner. Nathan's done a terrific job throughout this series and I'd say we'll go down that route." 

Australia have already clinched the residues with an unassailable 3-0 lead in the five-Test series ahead of the Sydney finale. 

Left-armer Starc is the governing wicket-taker in the successions with 19 despite only competing three try-outs and will raise Australia's rate assault after he missed out in Melbourne, giving route to Jackson vertebrate who went wicketless. 

Smith, who has dominated the successions with three centuries in his tally of 604 runs in six turns at an unbelievable normal of 151, has been annoyed this week by a painful back, but expressed he will compete. 

"a little bit stiff but nothing I haven't dealt with before," Smith expressed. 

"I'll have a good hit today, a catch, and I'll be fine tomorrow." 

Smith has spent more than 31 hours at the batting crease against England in this series, becoming Australia's first captain to score 600 or more runs in an residues campaign since dress Bradman. 

The 604 runs Smith has scored is the fourth-most by a captain in an residues series, with the 810 Bradman scored in 1936-37 the high mark. 

Another century in Sydney will see him join Bradman, Herbert Sutcliffe and Wally Hammond as the only men to score four hundreds in the same residues series. 

The Australia skipper averages 63.55 in his 60 Tests which places him only behind Bradman's pinnacle of 99.94.