Shreyas Iyer's 92 shone bright on a treacherous M Chinnaswamy pitch where 16 wickets fell on day one of the pink-ball Test between India and Sri Lanka in Bengaluru on Saturday. After just a two-over spell from Ashwin, Rohit Sharma turned to Mohammed Shami, who clean bowled Dimuth Karunaratne with a in-dipper to leave Sri Lanka 14 for 3. It …