Chennai Super Kings beat Kolkata Knight Riders by nine wickets in their crucial IPL match at M A Chidambaram stadium in Chennai last night. Chasing a victory target of 140 runs, Chennai Super Kings scored 143 for one in 13.3 overs. R Ashwin's superb bowling and Suresh Raina's explosive 78-run knock helped Chennai team comprehensively defeat Kolkata Knight Riders and keep their semi-final hopes alive. In another match, Mumbai Indians defeated Delhi Daredevils by 39 runs at the Brabourne Stadium in Mumbai. Chasing a victory target of 184 runs, Delhi Daredevils could manage only 144 for seven in 20 overs. In today's encounter, Rajasthan Royals take on Royal Challengers Bangalore at Sawai Man Singh Stadium, Jaipur.