"He was actually pretty keen to play the semi-final, wasn't quite 100 per cent so we erred on the side of caution.

"But yeah, I'm pretty confident he will get himself right."

Kallis looms as a straight swap for New Zealand batsman Henry Nicholls, who is returning to his homeland for regional duties with his club Canterbury.

"Henry Nicholls has got to go back to New Zealand ... that was part of the planning in giving Jacques this game off as well, to give him a few more days to get right for the final if we were good enough to get there," Hussey said.

The Thunder camp will remain in Adelaide on Friday before knowing where the final will be played - either in Melbourne or Perth, depending on which team wins Friday night's semi-final.