MUMBAI, Feb. 9 -- Sport is filled with examples of how a rivalry between top players brings the best out of both. We used to see it happen when Kapil Dev and Imran Khan played against each other or either went into a contest against Ian Botham's or Richard Hadlee's teams. Between the four, there were constant comparisons of who's the best all-rounder. It was the same when Sachin Tendulkar and Brian Lara shared the turf, vying for the tag of the best batter of their era....