Former Indian Captain Kapil Dev tells why spinner Bhuvneshwar Kumar does 'Knuckle balling'

Former Inidan Captain Kapil Dev tells why Mahendra Singh Dhoni asked Bhuvneshwar Kumar to do knuckle balling while match T20 match gainst South Africa. He also tells how knuckle balling is done. First Bhuvneshwar opens the bowling. Then he closes it. In between, when India loses its grip, he comes on to keep it tight.

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