Who is he ?

When he was 3 or 4 , he picked up a racket .
He loved any ball sport.
He started with lessons about 8.
Before that it was for fun. He would occupy himself for hours against a wall
or a cupboard . He would hit to the wall for hours and only came back
when he was thirsty or hungry.
He was upset when he lost a match . This was his ambition,very competitive.
He hated to lose. He worked with a mental trainer. He was wasting energy on emotions
instead of keeping calm. He got his whole personality and whole emotion under control.
After he overcame his teenage ups and downs , and he won Wimbledon juniors
in 1998 . He won sngles and doubles so he knew “ I can compete with all of them.”
Then he beat [Carlos] Moya ,a top 10 player, and then he had the feeling “ I can beat the top 10 .” The year after , he beat [Pete] Sampras. He knew " I can beat anybody .”He was beating the big guys at a very young age .

Do you find the answer ?

But anyway when Roger was a young child , he already had a wonderful balance.