| Score: | 7–6(7–5), 6–2 |
| Before Name: | French Open – Boys' singles |
See main article: 2018 French Open.
Tseng Chun-hsin won the boys' singles tennis title at the 2018 French Open, defeating Sebastián Báez in the final, 7–6(7–5), 6–2.
Alexei Popyrin was the defending champion, but was no longer eligible to participate in junior tournaments.