NSW coach Trevor Bayliss says it is up to Michael Clarke to decide if he is ready to play in the Blues' Sheffield Shield opener against Tasmania tomorrow, after he undergoes a fitness test this afternoon.
The Test skipper was a shock inclusion in a 12-man squad to take on the Tigers at Blacktown.
Cricket Australia gave him the green light to return to action ahead of the upcoming Ashes series, which starts on November 21 at the Gabba.
Clarke had been expected to return on November 6 against Victoria at the MCG, having not played since the final one-day international against England in September due to his troublesome back.
But Bayliss is confident Clarke will have no problems getting through a fitness drill to lead a side that contains Test players David Warner, Nathan Lyon and Steve Smith.
"We have a practice tomorrow and it will be up to Michael to make the final decision, but it sounds like everything is pretty good to go," Bayliss said.
"I think he'll be thinking about playing and it must be pretty good if he's been made available for selection.
"We weren't really sure when he was going to come back and were waiting on Cricket Australia and Michael to let us know.
"If we had got him for just one game we'd have been happy. To have more is great for NSW cricket."
Bayliss expects the pitch at Blacktown to be low and turning - very different from the expected fast, bouncy pitch at the Gabba.
But just getting Clarke in the middle would be the most important thing, he said.
"It's good for him to be coming back and getting some game time before the Ashes."
Also in this game, Ed Cowan will line up for Tasmania.
And he will be going head-to-head with Warner in the battle for a place in the Ashes opener.
Former Australian batting great and Test batting coach Justin Langer called for selectors to not make many changes to the batting line-up and said experience is key to winning back the urn.
Chris Rogers, Shane Watson, Clarke and Smith are certainties to play the First Test, with Warner, Cowan, Phil Hughes, Usman Khawaja and George Bailey in contention to fill the two other batting spots.
But Langer, who played 105 Tests and is now coaching Western Australia, said the selectors should keep faith in Cowan and Hughes, who were both axed in England for the final three Tests.
"I'd like to see them get some continuity into the side - I'm not the first one to say that," he said.
"Secondly, I'd like to see them for this series go with some experience - guys who have been around a little bit.
"I'd like to see a few senior heads, particularly around that batting order, just for this series in particular.
"I still wouldn't discount Ed Cowan either - again, the senior head.
"I really like the batting order they had in the First Test - that seniority at the top of the order and then a couple of kids at the end. Phil Hughes always has to be considered."