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.

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

During the match against Rublev, Joao showed all his power from baseline by shooting a forehand winner at 181 km/h. His forehand is the fastest in this edition of the tournament so far, ahead of Mpetshi Perricard (180 km/h) and Carlitos Alcaraz (178 km/h).