Buenos Aires, Feb. 18 -- Teenager Joao Fonseca won his first ATP Tour title at the Argentina Open on Sunday, announcing himself as one of tennis' brightest talents.

The 18-year-old Brazilian became the 10th-youngest player to win an ATP Tour title as he stunned home favorite Francisco Cerundolo 6-4, 7-6(1) in Buenos Aires, according to a CNN report.

The victory on clay also made Fonseca the second-youngest South American to win a title in the Open Era after Argentina's Guillermo Perez Roldan in 1987.

"For me, this (moment) that I'm living is just unbelievable," Fonseca said in his on-court interview after the match against Cerundolo, adding: "My real dream is to play tennis. Of course, I want to be No. 1; of course, I want to win slams, ...