Jonáš Forejtek won the boys' singles tennis title at the 2019 US Open, defeating Emilio Nava 6–7(4–7), 6–0, 6–2 in the final.
Thiago Seyboth Wild was the defending champion, but he is no longer eligible to participate in junior events.
Seeds
Main draw
Finals
Top half
Section 1
Section 2
Bottom half
Section 3
Section 4
Qualifying
Seeds
Qualifiers
Draw
First qualifier
Second qualifier
Third qualifier
Fourth qualifier
Fifth qualifier
Sixth qualifier
Seventh qualifier
Eighth qualifier
External links Draw