I guess he is not so responsive in the game or the sport anymore.
Drop him for few games and get younger talents to replace him, It is right that many Australian and Pakistani cricketers comment that all his score is against Weeker Teams in the world and he doesnot perform in big games against big teams, I guess he was never the best player in the world.
When one playes for one's country, 100 % fittness is the least expected & required from professionals.
We can understand the will to play but tendulkar has to learn fron the injury of Zaheer he has take full rest for if he agrivates it is not good for him as he already has only few more years left to play as age is not on his side anymore. I feel his best is still to come but it can come only if he is fully fit.
Rest is the best thing to do now.& wishing him all the best to good wishes. Sachin get well take good rest.
