In preparation for the start of the 2018-19 college basketball season in November, NCAA.com correspondent Andy Katz counted down the top 20 returning players in the nation. 

Twenty different schools and 10 conferences are represented by his 20 selections. The ACC and Big Ten conferences each have four representatives, and two each in the top five.

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Katz explained the reasoning behind his picks and interviewed some of his top 20 selections in the videos below via the @marchmadness Twitter account. Here's who made Katz's list:

1. Carsen Edwards, Purdue

2. Luke Maye, North Carolina

3. Caleb Martin, Nevada

4. Ethan Happ, Wisconsin

5. Kyle Guy, Virginia

6. Tyus Battle, Syracuse

7. Markus Howard, Marquette

8. Rui Hachimura, Gonzaga

9. Shamorie Ponds, Saint John's

10. Ky Bowman, Boston College

11. Grant Williams, Tennessee

12. Juwan Morgan, Indiana

13. James Palmer Jr., Nebraska

14. Bennie Boatwright, Southern California

15. Mike Daum, South Dakota State

16. Kellan Grady, Davidson

17. Tremont Waters, LSU

18. Lindell Wigginton, Iowa State

19. Jontay Porter, Missouri

20. McKinley Wright IV, Colorado

The 2018-19 college basketball season opens Tuesday, Nov. 6 with the Champions Classic. That will feature a doubleheader in Indianapolis between Duke and Kentucky, and Michigan State and Kansas.