Joao Fonseca made history at the Rolex Monte-Carlo Masters on Thursday, becoming the first Brazilian Masters 1000 quarterfinalist in 15 years and the youngest man to reach the Monte Carlo last eight since a teenage Rafael Nadal in 2005, dismantling Italian wild card Matteo Berrettini 6-3, 6-2 in 75 minutes on Court des Princes.
The 19-year-old from Rio de Janeiro was making his debut in the Principality and entered the round of 16 as the lower-ranked player, but he showed no sign of deference, playing with an aggression and sharpness that Berrettini — himself in the form of his life after a stunning double-bagel of Daniil Medvedev the previous day — could not match.
Fonseca found a number of sharp angles across the packed centre court and sustained pressure from the baseline throughout to seal a straight-sets win that moves him five places to No. 35 in the live ATP rankings.
The match had one meaningful moment of resistance from Berrettini. The Italian, playing on a wildcard and ranked 90th in the world, was broken at the start of the second set but hit back immediately, crushing a forehand pass to level at 2-2 and draw a roar from the crowd. It proved a brief reprieve. Fonseca regrouped, pulled Berrettini from corner to corner and broke again to seize control, closing out the match without further alarm.
“It is super special. I was looking for this result for a long time,” Fonseca said on court after the win. “Of course I want more. I am very confident and focused. I was very happy with the way I fought today. From the beginning, putting a lot of pressure. Playing huge return games and very good serve games. I was putting a lot of pressure and that helps you stay more calm during the match.”
The context makes the result all the more striking. Berrettini had entered the round of 16 having not dropped a single game across his first two matches in Monaco — a retirement win over Roberto Bautista Agut followed by Wednesday’s extraordinary 6-0, 6-0 demolition of world No. 10 Medvedev, a result that drew headlines around the world and briefly made Berrettini one of the tournament’s form stories. Against Fonseca, that form evaporated quickly.
For Fonseca, the win is the latest marker in a career trajectory that continues to accelerate. The former Next Gen ATP Finals champion and 2025 Buenos Aires title winner reached the fourth round at Indian Wells earlier this season, pushing Jannik Sinner to consecutive tiebreaks, before a back injury disrupted his hard-court swing.
He is now a first-time Masters 1000 quarterfinalist, the first Brazilian to reach that stage at any Masters event since Thomaz Bellucci in Madrid in 2011.
His reward is a quarterfinal meeting with third seed Alexander Zverev, who earlier on Thursday defeated Zizou Bergs 6-2, 7-5 to reach the last eight in Monte Carlo for the first time since 2022.
