Green was struck on the finger by a rising Anrich Nortje delivery while batting late on the second day of the ongoing second Test against the Proteas and was forced to retire hurt.
Australia's team management confirmed on the second day morning that Starc was cleared to play and he also batted in the nets. But the statement also said, "condition will be reassessed at the completion of the match" and no details of the results of his scans were available.
Australia have maintained their unbeaten Test status at home this summer and closed in on booking a spot at next year's World Test Championship final with a decisive six-wicket victory over a disappointing South Africa in the first Test in Brisbane on Sunday
The win sees Australia move further ahead at the top of the World Test Championship standings, while South Africa are overtaken by India and drop to third as a result of the loss
He has also widened the rating points gap with the second-ranked batter Mohammad Rizwan. Currently, Suryakumar has 890 points while Rizwan has 836 points