He is strong in the head. You can't win a junior Grand Slam...
He is strong in the head. You can't win a junior Grand Slam and knock out the world's No. 25 player in your first senior tournament if you're not strong in the head.
He is strong in the head. You can't win a junior Grand Slam and knock out the world's No. 25 player in your first senior tournament if you're not strong in the head.