

What Time Will Joao Fonseca Play Against Alexandre Muller?
Fonseca and Muller are on the Day 2 Schedule at Rio Open Presented By Claro 2025 on Tuesday 18 February 2025. Lets breakdown the career, past stats and recent form of these players and predict who will get the victory.
Who Will Win In This Head-To-Head?
[SE] Joao Fonseca (BRA) and Alexandre Muller (FRA) will face each other for the first time. Here is some information about each player:
Joao Fonseca, 18 years old, is currently ranked World No. 68, which is his career-high ranking. In 2025, he had a record of 6-2 and won the Buenos Aires title. In the previous year, Fonseca reached the quarterfinals of the Rio tournament, with a 2-2 record. He became the World No. 1 in the junior rankings in September 2023 and broke into the Top 100 of the PIF ATP Rankings 16 months later. Fonseca’s biggest career win was against No. 9 Rublev in the first round of the 2025 Australian Open as a qualifier. This victory made him the youngest man to defeat a Top 10 player in the history of the Australian Open. In the 2024 Next Gen ATP Finals, Fonseca went undefeated and became the champion, joining Alcaraz and Sinner as the only 18-year-olds to win the event. He also became the first South American champion at the tournament. In his hometown of Rio de Janeiro, Fonseca defeated Fils in the first round and Garin in the second round to become the youngest Brazilian quarterfinalist in the Open Era. Prior to his professional career, Fonseca won the 2023 US Open boys’ singles event, becoming the World No. 1 in the junior rankings.
Alexandre Muller, 28 years old, is currently ranked World No. 60, with a career-high ranking of No. 56. In 2025, he had a record of 5-2 and won the Hong Kong title. Muller’s breakthrough came in 2023 when he reached the Top 100 rankings after defeating former No. 4 Nishikori to win his first ATP Tour title in Hong Kong. In the same tournament, he saved two match points against Kecmanovic in the second round, becoming the third player in the Open Era to win a tour-level title after rallying from a set down in all matches played. Muller also achieved notable wins over clay-court champions Gasquet and Musetti at the 2023 Marrakech tournament and reached the fourth round of the 2024 ATP Masters 1000 Rome by defeating No. 6 Rublev. He made his tour-level debut at the 2017 Roland Garros and won his first tour-level match at the 2021 Australian Open as a lucky loser. Prior to his professional career, Muller had a 138-122 record in Challenger tournaments.
It is worth noting that Fonseca is currently on a five-match winning streak after his victory in Buenos Aires. He made his ATP Tour debut at the same venue in 2023 as a wild card and last year, he earned wins over Fils and Garin to become the youngest quarterfinalist in the history of the tournament. On the other hand, Muller is looking for his first win since winning his first ATP Tour title in Hong Kong earlier in the season. He could potentially become the first French player to win a match in Rio de Janeiro since Monfils reached the quarterfinals in 2018.
The match between Fonseca and Muller will take place on Quadra 1.
My Conclusion / Prediction:
My pick is that Fonseca will win.
Matchstat.com has an Artificial Intelligence (Ai) prediction model that is trained on all professional ATP and WTA past matches.
To find out who our model thinks will win for Joao Fonseca vs Alexandre Muller, have a look at the prediction here:
Matchstat.com Joao Fonseca vs Alexandre Muller prediction.