Only just turned 19, has moved from 133rd to #9 currently, just won in Madrid and is one of the favorites for French. Other than Medvedev, I don't see the other younger players being able to handle him if he stays focused and keeps improving. He has the opportunity to be one of the dominant players on the ATP Tour for 10+ years. As great as Fed, Rafa and the Joker are/have been, it's time for the new blood to take over, imo. Medvedev and Alacaraz both seem to have the games to do so. Still not convinced Zverev, Tsitsipas or any of the others have what it takes.