I think the biggest challenge for NBA players is that you gotta get used to the rules in international play. You know, like offensive goaltending is legal. The lane is shaped like a trapezoid instead of a rectangle. Oh and also rampant dick punching all over the place is completely common. I guess over in Europe they just coach different defensive tenets. Ball-you-man. Equidistance between your man and the ball. Move your feet. Keep your hands up. And also if you wanna try to steal the ball just punch guys in the ballsack.