The qualifier, who reached his first grand slam main draw, faces ninth seed Andrey Rublev in the opening round

At just 18, João Fonseca is putting the tennis world on notice, as illustrated by his clinical straight-sets victory over ninth seed Andrey Rublev at the Australian Open.

Endless queues outside Melbourne Park's 1573 Arena on a sunny Thursday afternoon gave casual fans the impression that a Grand Slam champion was in action, but a quick peek inside revealed the carnival atmosphere and explained the interest.

Teenage rising star Joao Fonseca said nerves got the better of him after being bundled out of the Australian Open by Italian Lorenzo Sonego in a five-set thriller on Thursday.

Italy's Lorenzo Sonego beat Brazilian Joao Fonseca, widely considered the rising star of international tennis, 6-7 6-3 6-1 3-6 6-3 on Thursday to reach the third round of the Australian Open. Lorenzo Musetti is also in the third round after beating Canadian Denis Shapovalov 7-6,