2. Novak Djokovic
Now I know what you're thinking here, "Novak Djokovic is world number one, why is he one to watch? That's just ridiculous", and on the face of it, it does sound ridiculous to recommend a 6-time Grand Slam world champion in this list. However, there is method to the madness. Novak Djokovic is just 26, he has at least half a decade of dominance left in him and that means that he is almost guaranteed to win an extensive amount of Grand Slams in that time, as well as breaking records and staking his claim as one of the greatest Men's Tennis players to have ever lived. Djokovic has all the attributes for it, especially his aggressive baseline play.