I am absolutely behind someone doing this. Its kind of a rude thing to but quite frankly, tennis is an athletic sports and if all you can do is hit the ball hard from a controlled position then you're not playing tennis. Dr Ivo SOMEWHAT justified this by having a good serve and volley game but its still a joke that serve-bots can get so many wins just by doing one thing whereas Djokovic trains everyday, puts himself through so much effort and practise to be good at all aspects and then gets beaten by a guy who can just swing hard well for 1 day.
I honestly don't get the problem with a player like Karlovic winning matches. One of the great things about tennis, imo, is that despite there being an ideal height, say 6'1-6'3, you still see players with vastly different physiques relying on different strategies to win. Would I like it if players like Karlovic and Isner dominated the rankings? No, but they don't. To me, the rules of tennis allows players of their type exactly the right chance. They can become top-20 players, heck even top-10 for a brief period in Isner's case. And then they can be jokers in an otherwise quite predictable draw.
In 2015, Novak lost to Fed (3), Stan (1), Murray (1) and Karlovic (1). You don't see guys like PCB, ARV and RBA on a list like that. Because while they all are incredibly solid, they lack the weapons to make the match unpredictable for a Big-3 guy, who's not injured. Karlovic and Isner brings that unpredictability. And imo, that's a good thing.
Also, while Karlovic does have the best serve in the history of tennis, the rest of his game is hardly as bad as some people make it look. Surely, his BH slice is above the average ATP-100 player? His volleys too. And, if in position, I would even say his forehand is probably above average too - at least in terms of being a point-ending shot. His major deficit is his movement and that causes people to think he can hardly play tennis apart from his serve.
Looks like that to me as well. I've seen him serve without bouncing but only in his one of his imitating performances (when he did a Becker serve for example) which this game kinda was. A funny and unique way of expressing his frustration with Ivo's game.
Tbh, I found it no better than Söderling pulling his shorts and taking plenty of time to serve, when playing Rafa in 2007.
On second thought, I find it worse. Djoko is mocking a legitimate way to play tennis. Söderling is mocking Rafa breaking the time rules by going through his rituals.