A Test series in India invariably boils down to the spinners. The last time the subcontinental giants lost a series at home, to England in 2012-13, spinners Graeme Swann and Monty Panesar wreaked havoc.
India took their lessons from that series and made it mandatory to include one (or two) left-arm spinners who can bowl at pace, along with star off-spinner R Ashwin, and play on tracks that usually turn from the first session of the first day.
