NAGPUR — Captain Virat Kohli Thursday said India had demanded fast, green-topped wickets for the Test series against Sri Lanka to prepare for their tour of South Africa. The hosts laid out a green pitch in the opening Test in Kolkata, and Nagpur is also expected to favor the fast bowlers in the second Test starting Friday. The three Sri Lanka Tests come before India, the world's top-ranked team, embark on a three-Test tour starting January in South Africa, where they have never won a Test series. Kohli confirmed reports that team management had ordered fast pitches, instead of the traditional spin-friendly tracks, to get used to South Africa-