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.

Backed by a raucous Brazilian contingent on Court 1573, Fonseca took the hour-long opener in the decider, eventually clinching set point at the fourth time of asking

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.

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,