Stefanos Tsitsipas reigned supreme over Alex De Minaur, Andrey Rublev, Francis Tiafoe and others at the ATP Next Gen Finals last week. I discuss all the Next Geners and then answer your questions, including who out of Federer, Nadal and Djokovic achieved the highest level of tennis in their careers. I also discuss the experimental rules implemented by the tournament. Lastly, I preview the World Tour Finals in London.