Rafa Nadal predicts that Carlos Alcaraz will go on to win "many more titles" following his triumph at the Miami Open.
By winning the event - Alcaraz beat Norwegian Casper Ruud in the final - the 18-year-old became the third-youngest winner of an ATP Masters 1000 event in the format's history, with the only men younger being Michael Chang and Nadal himself.
Nadal therefore is well qualified to comment on the potential of his up-and-coming compatriot, who will now enter the clay-court season - the surface he grew up on - as one of the favourites for the swing's main tournaments.
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Writing in Spanish on his social media, Nadal said: "Many congratulations Carlitos for your HISTORIC win in Miami.
"It's the first of many more titles to come, I'm sure!"
Nadal also sent words of consolation to Ruud after a fine run on the American hard courts.
The 20-time Grand Slam winner said: "And congrats Casper for an amazing tournament and result. Great swing!!!"
Ahead of the Miami final, Rafa's uncle Toni was another knowledgeable figure to heap praise on Alcaraz, stating his view that the prodigy "has become a complete player and very difficult to overwhelm".
Until last month, it was 35-year-old Nadal who had been the dominant figure on the men's tour this season following his wins at the Australian Open and in Acapulco, and a final appearance in Indian Wells.
But with Nadal absent from Miami with a rib injury, Alcaraz has quickly muscled in on the act to announce his coming-of-age.
It promises to be some battle on the clay, with Nadal potentially able to return at the Madrid Masters in May.
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