Basically there are two types of rankings - the one being the actual rankings according to the total ranking system in use since 1658 and the second one being the race based on performances this year to participate in the Player Championship in Turyn in November 2021.
The Standard ATP Ranking
1 Novak Djokovic
2 Danill Medvedev
3 Stefanos Tsisipas
4 Alexander Sverev
5 Andrey Rublev
6 Rafael Nadal
7 Matteo Berrettini
8 Dominic Thiem
9 Roger Federer
10 Casper Ruud
11 Felix Auger-Aliasime
12 Denis Shapovalov
13 Hubert Hurkacz