João Fonseca João Fonseca may refer to:
* João Fonseca (footballer) (born 1948), Portuguese football manager and former goalkeeper
*João Fonseca (tennis)
João Franca Guimarães Fonseca (; born 21 August 2006) is a Brazilians, Brazilian professional tenn ...
won the boys' singles title at the 2023 US Open, defeating
Learner Tien
Learner Tien (born December 2, 2005) is an American professional tennis player. He has a career-high ATP singles ranking of world No. 66, achieved on March 17, 2025 and a doubles ranking of No. 722, achieved on February 3, 2025.
Early life
Tie ...
in the final, 4–6, 6–4, 6–3.
Martín Landaluce
Martín Landaluce Lacambra (born 8 January 2006) is a Spanish tennis player.
He has a career high ATP singles ranking of No. 133 achieved on 17 February 2025. He also had a career high ITF junior combined ranking of world No. 1 achieved on 27 Fe ...
was the reigning champion,
but chose not to participate.
Seeds
Draw
Finals
Top half
Section 1
Section 2
Bottom half
Section 3
Section 4
Qualifying
Seeds
Qualifiers
Lucky loser
# Markus Mölder
Draw
First qualifier
Second qualifier
Third qualifier
Fourth qualifier
Fifth qualifier
Sixth qualifier
Seventh qualifier
Eighth qualifier
References
External links
Main drawat usopen.com
Qualifying drawat usopen.com
{{DEFAULTSORT:2023 US Open - Boys' Singles
Boys' Singles
2023
Catastrophic natural disasters in 2023 included the Lists of 21st-century earthquakes, 5th-deadliest earthquake of the 21st century 2023 Turkey–Syria earthquakes, striking Turkey and Syria, leaving up to 62,000 people dead; Cyclone Freddy ...