Kyrgios is a nut-job. He's got all the tools but brains and balls that rank in the rodent category.
Thiem and Zverev are the future.
agreed general. Thiem and Zverev have a lot going for them. near complete games at such an early age. they have the drive, maturity, focus, hunger, determination, and the will to achieve. you can see it in their eyes.
still time for the greek warrior (kyrgios) to grow up. some just mature late.
a couple of good coaches can teach him the mental discipline needed in this sport.