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......

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......

Teen Tien matches Sampras mark, celebrates with pizza

'Not too many pepperonis. More just cheese.' IMAGE: Learner Tien, 19, is the youngest American man to reach the third round of the Australian Open since an 18-year-old Pete Sampras in 1990.......

Collins blows kisses at booing crowd, Sinner through

Collins turns on hostile Melbourne crowd after defying Destanee IMAGE: Danielle Collins of the US celebrates winning her second round match against Australia's Destanee......

PIX: Sinner-less Italy, Alcaraz's Spain off to winning start

IMAGE: Spain's Carlos Alcaraz in action during his singles match against Czech Republic's Tomas Machac in their Davis Cup Group B tie at Pabellon Fuente de San Luis, Valencia, Spain, on Wednesday.......