He attended the net session on Wednesday, but just watched proceedings as he did not take part as a precautionary measure.
Kleinveldt was 85 % fit while taking part in two domestic T20-games against the bizhub Highveld Lions after a lengthy period off the field due to a knee injury which ruled him out of selection for the South African touring squad to Sri Lanka, and subsequently, Zimbabwe.
He is now 95 % fit and will be ready for the first game in India, said Ontong.
Kleinveldt trained on Wednesday without any restraint.
Philander, who did not participate in the triangular one-day series in Zimbabwe due to a hamstring-scare, did play in two warm-up games against the Lions. He is considered a certain starter in India.
Justin Kemp, who did not play in the Franchise Challenge as part of the Global Softech Sixes tournament due to a hamstring-injury, will also be ready for the first game in India.
Ontong said all three these all-rounders are pivotal as they can hit big sixes, but also play a role in taking wickets or containing batsmen.
“It is great to have so many all-rounders. If you have only four specialist bowlers and three of them travel (or concede many runs per over), you might have a problem.
“But if you can call on six or seven bowlers, you have options.”
Paul Adams, the Cobras-coach, said you have to be able to participate in two disciplines (batting and bowling) in T20-cricket, with the third option being fielding.
Ontong added that Australia is a recent example of an international team that boast the presence of many all-rounders in T20-cricket and even in One Day Internationals.
The Cobras will field several players who can be termed all-rounders. Robin Peterson, Kemp, Ontong, Kleinveldt, Philander and even Dane Piedt fall in this category.
Piedt has a highest first-class score of 92 and is no slouch with the bat, while both he and Peterson add variety to a bowling attack of international class.