How soon we forget. People have been resisting comparisons to all of the Big 3, (though the mountain of ink being spilled over them now should put that to rest.) But no one is saying that Charly is exactly Roger, and not Roger in 2004-06. Roger wasn't even "Roger" when he was 20. Only Rafa was a proven commodity at 20, and he didn't have the complete game of Charly.
I was just thinking something similar, and in relation to Pat Cash's comment in an article up-thread, about "who is going to challenge him the next few years?"
Roger was
largely un-challenged in 2004-07, when he won 11 of 16 Slams. Sure, it wasn't until 2005 that he started doing deep at Roland Garros, and of course by then Rafa had risen. And Rafa
did challenge him, obviously, from that point on, but in terms of reigning over the tour, Roger was was dominant as anyone has ever been.
But like Roger, in 2004, no one knew that Rafa would be the player he became just a year later (and then more fully in 2008).
Similarly no one knew at the end of 2002 that Hewitt was done winning Slams, or Roddick in 2003. When Roger emerged more fully in 2004, I'm guessing people (especially the players!) would have been surprised to think that his generation would be entirely swallowed (except for that lone Safin Slam in 2005) by Fedal.
So while I hear Cash's point, two things make me pause. One, tennis is an evolving field; two, players develop at difference paces.
I
do think Alcaraz will get even better and be the player to beat in the foreseeable future, but what I question is that he'll have anything like Roger's reign in 2004-07. Not only will Novak still be around for the next year or two (who is much better now than the Agassi of 2004-06), but we don't know how much more other young players will develop, especially Rune, but also Sinner and even guys like Korda, Musetti, FAA, and pups like Shelton, Fils and Van Assche. Presumably all of those guys have further development ahead of them.
Alcaraz, like Rafa, is an early and quick bloomer. Some greats were like that - Rafa, Becker, Wilander, Borg and Mac in particular - but some took a bit longer to bake. Even Jannik Sinner isn't really far off from where Roger was at his age. Sinner turns 22 next month; that is the equivalent of Roger in 2003, when he won his first Slam. Their Elo are kind of similar, too (And no, I don't think Sinner will be as good as Roger! Just using him as an example of how differently players develop).
And I personally still hope that Holger Rune will be a worthy opponent for Alcaraz. To me he has scary potential.