I can't believe that there was a time like that even for him.
It's unbelievable to think that even a very good player like him had trouble at first.
I can't believe（ 信じられない） that there was a time like that（ そういう時期があった） even for him. （ 彼でも）
It's unbelievable to think（ 考えて信じられないが） that even a very good player like him （ あんなに上手な 彼でも）had trouble at first. （ 最初はダメだった）
オーストラリア 
