Kolkata - The Royal Challengers Bangalore top the IPL points table.
They claimed top spot with a seven wicket over Rajasthan Royals at Eden Gardens.
The Chennai Super Kings were also winners during their visit to the Kolkata Knight Riders.
The hosts decision to bat first did not pay off on a difficult pitch.
Ravindra Jadeja bagged three for 20 as Kolkata were restricted to 119 for 9 in their 20.
Chennai also struggled with the bat.
They were reduced to 89 for six before Jadeja rescued them again.
His 36 off 14 balls saw Chennai win by four wickets with five balls to spare.