Chennai Super Kings humbled Kolkata Knight Riders by nine wickets to storm into second place in the IPL here Tuesday. After spinner Ashwin took the new ball and rocked the Kolkata top order. Raina and Vijay sent on a scoring spree after the fall of Hayden for nought. Scores: Kolkata 139-8 (Tiwary 27, Mthews 48, Ashwin 3-16, Bollinger 2-15). Chennai 143-1 in 13. 4 overs (Vijay 50 n.o., Raina 78 n.o.) Kieron Pollard exploded with 45 from 13 balls as Mumbai Indians continued their winning spree by outplaying Delhi Daredevils by 39 runs here Tuesday. Scores: Mumbai 183-4 (Tendulkar 30, Tiwary 38, Rayudu 24, Pollard 45, Sangwan 2-35). Delhi 133-7 (Warner 31, Sehwag 20, McDonald 33, Fernando 2-32, Murtaza 2