There is a time an place for this and it's called the WWE. There it's controlled and therefore entertaining in a slapstick kind of way.The whole 'real man' performance thing which is so comical especially from a relatively effete sport like tennis on top of everything else.
What's next? Alpine skiers walk up to rivals and scream in their faces for daring to perform a really good slalom? Golfers bend their clubs right in front of their rivals after they make a great shot?
A certain kind of younger male who thinks aggression is almost never out of place as an emotion is more likely to find this kind of performance (and it is performance) more appealing than all other groups.