In his first-ever Grand Slam match, Fonseca defeated World No. 9 Andrey Rublev in straight sets: 7-6 (1), 6-3, 7-6 (5). The match was evenly contested, but Fonseca was dominant with his power and agility.

Brazilian teenager Joao Fonseca began his Grand Slam career in spectacular fashion as the qualifier took down Russian ninth seed Andrey Rublev 7-6(1) 6-3 7-6(5) in the first round of the Australian Open on Tuesday.

Joao Fonseca has been waiting for his chance to play on the biggest stages of tennis, and what a way to arrive. The 18-year-old qualifier upset world No.9 Andrey Rublev in straight sets to claim his maiden Grand Slam win.