Kallis was struck on his left big toe by a yorker from a net bowler and was taken for X-rays, on Monday morning, which revealed deep bruising. He was fit enough to bat again during practice on Monday but did not bowl.
"I'm not worried about it," said team physiotherapist Shane
A decision will be taken on Tuesday as to whether Kallis will be fit for South Africa's warm-up game against provincial side Boland in Paarl later in the day.
Gibbs was struck on the right shoulder when he was early on a hook shot but he, too, suffered bruising only. He batted in the nets on Monday although he experienced some difficulty raising his right arm.