Royal Challengers Bangalore have defeated Delhi Daredevils by 20 runs in their IPL match in Bangalore.Batting to meet the target of 158 set by Royal Challengers Bangalore, Delhi Daredevils finished their turn with a poor 137 for 7 in 20 overs.The brilliant batting of A B de Villiers 64 not out and Andrew McDonald 30 helped the Bangalore team to win comprehensively.The IPL match between Deccan Chargers and Chennai Super kings did not begin when the last report came in.