NEW DELHI, March 20 -- This Saturday, they will stand against each other. When Chennai Super Kings meet Royal Challengers Bangalore in the Indian Premier League (IPL) opener, MS Dhoni will lead his Chennai team out with a fourth title in mind and Virat Kohli will be chasing his first. While a battle of wits between the former India captain and the country's current skipper is always a thrilling prospect, there is little doubt that India's tactical game rises several notches when the two play together. In white ball cricket, Dhoni remains a pillar for Kohli to lean on, and his strongest tactical wingman....