Kolkata, May 8 -- Thirty runs in one over from Vaibhav Arora was all it took Chennai Super Kings to stage a coup, beating Kolkata Knight Riders by two wickets after looking down and out at 60/5. Dewald Brevis orchestrated this turnaround, blasting 52 in 25 balls and leaving MS Dhoni with a required run rate of 6.62. Clobbering a six off Andre Russell, he guided the win with two balls to spare, consigning KKR to another frustrating defeat at Eden Gardens that nearly put them on the brink in the race to the IPL playoffs. Till the 11th over of the chase, KKR seemed to have the match in their grasp. CSK were keeping up with the asking rate thanks to Urvil Patel's 11-ball 31 but having lost half the side and with Dhoni not exactly in blistering ...