I don't like Joe Root. To me he comes off very arrogant, much like an Australian...
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However, he has batted very well this series and exactly what England needed. He still needs to show he can do it against a decent attack as he showed last summer that he was out of his depth. I hope he continues to get better for Englands sake.
I hope the England selectors don't tamper too much with Robson. Don't get into what NZ always does. Give a guy a go for a few tests, he fails and then throw him to the wolves. Robson must have been good enough to make the team initially, so back him up tell him he is the guy they want and let him feel part of the squad.