30. Marin Cilic
At the 2014 US Open, the Croat won the tournament hitting so hard with his big first serve. He was steady and he was controlled. He hit No. 3 but that was three years ago. This year, he looked pretty decent at times. He won St. Petersburg and Stuttgart, which terrific, but at the Grand Slams, or the ATP 1000’s, he did not go far. He is aging and, at 33, will he find a second wind.
29. Karen Khachanov
The Russian is also pretty tall, and three years ago, he became No. 8, as he has a gigantic serve and he can blast the ball. In 2019, he went deep at Roland Garros, Montreal and Beijing. He was riding high. This year he did have a couple good tournaments at the Olympics and Tokyo. He can bash it on the lines, and also, he can be intelligent. The 25-year-old works a lot, on and off the court, and probably plays too often. Maybe he can add more spin and his improve his return.
28. Grigor Dimitrov
The Bulgarian continues to do so many things, playing with a lot of variety. However, he can be frustrated when he is hitting the ball too short. He does like to mix it up, and he can also attack when he sees the chance. At this point, if he wants to come back into the top 10, he is going to have to shorten the points, and go for it, win or lose. If he doesn’t, then he won’t be able to go super deep at the Slams.
27. Lorenzo Sonego
The 26-year-old Italian had a pretty good year, upsetting two excellent players Dominic Thiem and Andrey Rublev in Rome and reaching the semis. He won Cagliari, as he seems to really like on the clay. On the hardcourts, he was mediocre at best. He has yet to go into the top 20, and he is close. But, if he really wants to improve, then he should change a few things, like with his serves, and his backhand. Just swing harder.
26. Reilly Opelka
The tall American had a very good year. He improved his foot speed, his first serve and forehand, which are huge. Mentally, on various tournaments, he finally saw that to win more matches, he had to decide and stick to his tactics. Plus, he ws hitting deeper into the court. That is why he finally broke into the top 30. Yes, towards the end, he wore down, but if he improves his return and works on attacking the net during the off season, then he has a chance to go into the top 15 in 2022. Even further? Sure, why not.