2025 Clube Tenis Porto Challenger – Singles
| Singles | |
|---|---|
| 2025 Clube Tenis Porto Challenger | |
| Champion | Guy den Ouden |
| Runner-up | Gilles-Arnaud Bailly |
| Score | 6–4, 6–2 |
Adrian Andreev was the defending champion but chose not to defend his title.
Guy den Ouden won the title after defeating Gilles-Arnaud Bailly 6–4, 6–2 in the final.