Fonseca, youngest Brazilian to win an ATP tournament!

IMAGE: 18-year-old Joao Fonseca celebrates after winning the Argentina Open final against Argentina's Francisco Cerundolo in Buenos Aires, on Sunday. Photographs: Matias Baglietto/Reuters Joao......

Fritz loses in quarters; Fonseca wins marathon battle

IMAGE: Taylor Fritz was shocked by Alejandro Davidovich Fokina in the quarter-finals of the Delray Beach Open on Friday. Photograph: Mike Frey-Imagn Images/Reuters Top seed Taylor Fritz of the......

Aus Open: Brazilian teen Fonseca knocks out Rublev

IMAGE: Brazil's Joao Fonseca reacts during his first round match against Russia's Andrey Rublev. Photograph: Jaimi Joy/Reuters Brazilian teenager Joao Fonseca began his Grand Slam career in......

Youngest since Nadal: Tien makes Aus Open history

IMAGE: Learner Tien of the US in action during his third round match against France's Corentin Moutet. Photograph: Francis Mascarenhas/Reuters American qualifier Learner Tien became the......

Alcaraz warns: Teen trio could beat anyone, even me!

IMAGE: Spain's Carlos Alcaraz celebrates winning his third round match against Portugal's Nuno Borges. Photograph: Tingshu Wang/Reuters Carlos Alcaraz said he thought the trio of teenagers......