He is only 18 years old and has an ATP title - Brazilian Joao Felix is the winner of the Argentine Open in Buenos Aires, after defeating fifth favorite Francisco Cerundolo in the final - 6:4, 7:6.
Although he had some downs in his game, losing serve twice to end the match before the tie-break, the first player born in 2006 to reach the final of an ATP tournament coped with both the pressure and the home fans of his rival, the 28th player in the world.
In the tie-break, the 99th player, Fonseca, was perfectly accurate and won the trophy.
He showed in the quarterfinals that he has "strong" nerves, as he saved two match points against Navone.
"I can't wait for the first duel between Fonseca and Alcaraz," Andy Murray announced on the X network ahead of tonight's final.
Fonseca will be the 68th player in the world as of tomorrow, he is the tenth youngest winner of an ATP tournament, and he earned the attention of the wider public by eliminating Andrei Rublev at the Australian Open.
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