Carlos Alcaraz returned to the summit of the ATP rankings this week following his win at the Indian Wells Open.

The youngest World No. 1 in tennis history further reminded everyone why he is a future superstar in the sport while comparisons with Rafael Nadal only increased.

In fairness, other than their shared nationality, there are some genuine similarities between the Spaniards, not least their accomplishments as teenagers.

However, Paul Annacone, the ex-coach of Roger Federer, disagrees with those comparisons. Instead, he believes the 19-year-old is more like Federer.

“I think he’s a lot more like Roger than Rafa,” Paul Annacone told The New York Times. “Because Rafa couldn’t take the ball early like this when he was 19, and Rafa couldn’t come forward like this. Roger could always stay on the baseline and always look like he had time, and that’s how this kid looks.”

Alcaraz also has the feather in his cap of being No. 1 as a teenager — something neither Federer, Nadal nor Novak Djokovic could accomplish.

And as far as Annacone is concerned, Alcaraz is “the most complete 19-year-old men's player” in recent memory because he can do just about everything.

“The interesting thing for me is watching someone who is this athletically talented with his running, jumping, explosiveness and flexibility, but also has the hand-eye coordination to be able to take the ball early on the rise, come forward and volley,” Annacone added. “He also can back up and change pace. He can do everything.”

Carlos Alcaraz will look to defend his Miami Open title next.