I don't like any of them should be an option.
These tennis factories are producing very boring players with very little individuality, flair and worst of all, passion for the game. Some have a passion for winning but I am not seeing a passion for tennis. The best players of the last 20 years Federer, Djokovic, Nadal, Williams sisters developed their individuality and game outside of the hothouse and brought something different that their tour opponents had never seen before. How do you even find anyone to practice with who plays like Nadal?
Who in this poll brings something that you have never seen before?
So my answer is none of them.