Casper Ruud defeated Miomir Kecmanović in the final, 6–2, 7–6(7–3) to win the singles tennis title at the 2023 Estoril Open. The victory marked Ruud's tenth career singles title and his first of the season. Kecmanović was bidding to secure his second career singles title.
Sebastián Báez was the defending champion, but lost in the quarterfinals to Ruud.
Seeds The top four seeds received a bye into the second round.
Draw
Finals
Top half
Bottom half
Qualifying Seeds
Qualifiers
Qualifying draw
First qualifier
Second qualifier
Third qualifier
Fourth qualifier
References
External links Main draw Qualifying draw