Joao Fonseca definitively introduced himself to the world as the latest teen sensation in men’s tennis, upsetting No. 9 seed Andrey Rublev in the first round of the Australian Open.

Fonseca has long looked like a star-in-waiting. Under pressure in his first Grand Slam set, he delivered beyond those lofty expectations

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,