At the start of his tennis career Novak Djokovic suffered a myriad of health problems. During that time period he won one Major. Then he went gluten free cutting out milk and refined sugar from his diet as well. He is on the cusp of winning an unprecedented 23 Major at Roland Garros. In the semi's he played young hotshot Carlos Alcaraz and schooled him the final two sets 6-1. 6-1, he is the GOAT of his sport.
