Former India batsman V.V.S. Laxman was all praise for Virat Kohli after the India skipper slammed a career-best unbeaten 254 in the first innings of the second Test against South Africa here on Friday. Riding on Kohli's record seventh double century, the most by an Indian batsman, India declared on 601/5 before reducing South Africa to 36/3 at stumps on Day 2.