I think, the DON mostly faced bowling attacks from England which were no where near the best attack that England had. I think England's best bowling attack was during the time of Botham. So when one looks at the bowling attacks that Sachin faced during his career, he is the true DON! Averages don't necessarily speak the truth! So DON BRADMAN'S average of 99 plus is not a true reflection of his cricketing talent as opposed to SACHIN's.
