João Fonseca has definitively introduced himself to the world as the latest teen sensation in men’s tennis by upsetting No. 9 seed Andrey Rublev 7-6 (1), 6-3, 7-6 (5) in the first round of the Australian Open.

No. 112-ranked Joao Fonseca will meet No. 55 Lorenzo Sonego in the Australian Open Round of 64 on Wednesday, January 15.In his last time out, Fonseca was defeated by Eliot Spizzirri 6-7, 7-6, 4-6