

What Time Will Joao Fonseca Play Against Learner Tien?
Fonseca and Tien are on the Day 2 Schedule at Miami Open Presented By Itau 2025 on Thursday 20 March 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?
Joao Fonseca (BRA) and Learner Tien (USA) have faced each other in four previous matches, with Fonseca leading the head-to-head 2-0. They have met twice at the Next Gen ATP Finals in Saudi Arabia, on a hard surface. In their first match, Fonseca won with a score of 4-0 4-0 1-4 4-2 in the round-robin stage, and then again in the final with a score of 2-4 4-3(8) 4-0 4-2. In their other meetings, Tien defeated Fonseca 6-3 2-6 6-1 at the Roland Garros Juniors on clay, and Fonseca won 4-6 6-4 6-3 at the US Open Juniors on hard court.
In the two Next Gen ATP Finals matches, Fonseca demonstrated a stronger attacking game, with a higher conversion score and a higher steal score compared to Tien. Fonseca also had a higher serve quality, return quality, forehand quality, and backhand quality.
Specifically, Fonseca hit 60% of groundstrokes on the forehand side, exceeding the tour average of 54%. His average forehand speed was 81mph, higher than the tour average of 76mph. Additionally, Fonseca had an impressive spin rate of 3135 rpm, compared to the tour average of 2844 rpm.
Joao Fonseca is 18 years old and is currently ranked 60th in the world. He achieved his career-high ranking of No. 60 in March 2025, after winning the Phoenix CH title. Fonseca became the junior No. 1 in September 2023 and broke into the top 100 of PIF ATP Rankings 16 months later. He won his first tour-level title at the 2025 Buenos Aires tournament, becoming the youngest South American tour-level champion since Perez-Roldan in 1987 and the youngest Brazilian champion in the Open Era. Fonseca also achieved a notable victory over No. 9 Rublev at the 2025 Australian Open, becoming the youngest man to defeat a Top 10 player at the Australian Open in PIF ATP Rankings history. He won the 2024 Next Gen ATP Finals, joining Alcaraz and Sinner as the only 18-year-old champions in the event’s history.
Learner Tien is 19 years old and is currently ranked 66th in the world, his career-high ranking. He broke into the top 200 in August 2024, the top 100 in January 2025, and reached his career-high ranking in March 2025 after defeating No. 2 Zverev. Tien upset No. 5 Medvedev at the Australian Open, becoming the youngest man to defeat a top 5 player at that event in PIF ATP Rankings history. He qualified for the 2024 Next Gen ATP Finals, defeating top seeds in the round-robin stage and becoming the first left-handed finalist in the event’s history. Tien went on a 28-match winning streak, winning several ITF Tour titles and his first Challenger title. He qualified for the US Open in 2022 and 2023 after winning the USTA Boys’ 18s National Championships, and received a wild card for the 2024 US Open by winning the US Open Wild Card Challenge.
Fonseca aims to maintain his perfect record in ATP Masters 1000 first rounds, following his wins in the first round of the 2024 Madrid and Indian Wells tournaments. After losing to eventual champion Draper in the second round of the Indian Wells tournament, Fonseca won his third Challenger title in Phoenix. Tien is seeking his first ATP Masters 1000 win after losing in the first round of the Indian Wells tournament against Navone. He aims to become the youngest American man to win a match in Miami since Tiafoe in 2017.
The match between Joao Fonseca and Learner Tien will take place on the Grandstand court.
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 Learner Tien, have a look at the prediction here:
Matchstat.com Joao Fonseca vs Learner Tien prediction.