The South Africa great believes Jansen is now an even better player, suggesting his recent Player of the Match heroics in the second Test against India in Guwahati will provide the 25-year-old with an extra level of confidence heading into the T20 World Cup.
“He’s had a massive year, hasn’t he,” Kallis said.
“He’s always had the potential. It was just a matter of figuring his game out. He’s obviously figured it out now and is getting a good balance.
“He’s always been magnificent with the ball. Perhaps in previous years, he didn’t quite fulfil his talent with the bat.
“He’s certainly turned that around now. He’s a premium all-rounder now.”
South Africa are drawn alongside New Zealand, Afghanistan, Canada and UAE at next year’s T20 World Cup, with their opening match at the tournament coming against Canada on February 9 in Ahmedabad.