From Open Era onward, here is a list of notable players (slam champions) Alcaraz at 20 years old is already better than
Andres Gimeno
Manuel Orantes
Mark Edmondson
Adriano Panatta
Roscoe Tanner
Vitas Gerulaitis
Brian Teacher
Johan Kriek
Yannick Noah
Pat Cash
Michael Chang
Andres Gomez
Michael Stitch
Sergi Bruguera
Thomas Muster
Richard Krajicek
Petr Korda
Carlos Moya (Nadal's coach)
Goran Ivanisevic (Djokovic's coach)
Thomas Johansson
Albert Costa
Juan Carlos Ferrero (His own coach)
Gaston Gaudio
Andy Roddick
Juan Martin Del Potro
Marin Cilic
Dominic Thiem
Daniil Medvedev
Here is a list of players that he is equal to or an argument can be made he is greater than
Stan Smith
Ilie Nastase
Patrick Rafter
Marat Safin
Lleyton Hewitt
And finally a list of players that he is still behind, but is on the verge of passing them or has them in his sights for next year
Arthur Ashe
Jan Kodes
Guillermo Vilas
Jim Courier
Gustavo Kuerten
Andy Murray
Stan Wawrinka
I wanted to put this together to make sure everyone knows exactly what's happening. These are players he's already sharing a level with on the greatness rankings, at 20 years old, TWENTY. The fact he can retire tomorrow and genuinely have a greater career than the likes of Carlos Moya, Juan Carlos Ferrero, and Thomas Muster is incredible to me.