Debutant opener Rohan S Kunnumal and skipper Hanuma Vihari's unbeaten hundreds powered South Zone to 324 for 2 at stumps against North Zone in the semifinal of the Duleep Trophy cricket tournament in Salem on Thursday. Opting to bat, South got off to a solid start with Kunnumal and Agarwal (49, 59 balls, 6X4, 1X6) matching each other stroke for stroke. The 24-year-old Kunnumal from Kerala was the first to reach the half-century as they two added 100. Agarwal, who looked in good touch, was bowled by spinner Nishant Sindhu.