Let me explain it to you in a way you can understand: Roger ALWAYS had behavior issues growing up, throwing tantrums, screaming, destroying rackets left and right, he learned to control himself on court otherwise he would have been the biggest talent waste ever; doesn't mean he doesn't feel passion, it means that he grew up but can have outbursts like these at times because he's human and no one can be calm all the time.
People who watched tennis before 2004 know Rogi has an inner beast. Frankly I miss the days when his ponytail used to sway violently on court in between points.
A forum community dedicated to male tennis players and enthusiasts. Talk about everything from the ATP, NSMTA, to college Tennis and even everything about equipment. It's all here!