Kallis: Final bat 'strange'
Jacques Kallis admitted it was "strange" walking out to bat for possibly the last time in Test cricket.
The 38-year-old will retire after South Africa's second and final Test against India in Durban.
The tourists closed on 68-2 at the end of the fourth day after a Kallis century had earlier helped the Proteas to a 166-run first-innings lead.
Kallis said: "It is strange walking out to bat knowing that there is no tomorrow and it will be your last opportunity to get a 100 for your country.
"It's a different kind of pressure, being in the nineties for the last time was different to normally being in the nineties. At least I could fall back on my experience and managed to get the three figures."
"In the situation that we were in it was important to consolidate a bit and make sure we got back on track after losing a few wickets.
"We basically tried to pace the innings and to keep the scoreboard ticking. It was quite difficult to score because the wicket is quite slow, they put up defensive fields and bowled quite defensively.
"As we got closer to their total we could afford to be more positive. I thought the guys really paced the innings well."
Kallis's 115 in the first innings was his 45th Test century and moved him up to third on the all-time list of Test run-scorers behind Sachin Tendulkar and Ricky Ponting.
Team-mate Robin Peterson, who himself made 61, admitted Kallis reaching the 100 mark was a momentous moment for the whole team.
"With 20 runs to go to 100, I think all the boys were playing the innings with him," Peterson said. "The guys were pretty emotional, especially the guys who have played with him for a long time."