2023 BOSS Open – Singles

Frances Tiafoe defeated Jan-Lennard Struff in the final, 4–6, 7–6(7–1), 7–6(10–8) to win the singles title at the 2023 Stuttgart Open. It was his third ATP Tour title, and his first on grass courts (following titles on hardcourts and clay courts). Tiafoe saved a championship point en route to the title, in the final-set tiebreak. By winning the title, Tiafoe debuted in the top ten of the ATP rankings for the first time in his career.

Matteo Berrettini was the defending champion, but lost in the first round to Lorenzo Sonego.

Seeds
The top four seeds received a bye into the second round. • # Stefanos Tsitsipas (second round)

• #🇺🇸 Taylor Fritz (quarterfinals)

• #🇺🇸 Frances Tiafoe (champion)

• #🇵🇱 Hubert Hurkacz (semifinals)

• #🇺🇸 Tommy Paul (second round)

• #🇮🇹 Lorenzo Musetti (quarterfinals)

• #🇮🇹 Matteo Berrettini (first round)

• #🇦🇺 Nick Kyrgios (first round)

Seeds
• # 🇺🇸 Christopher Eubanks (qualified)

• # 🇭🇺 Márton Fucsovics (qualified)

• # Roman Safiullin (first round)

• # Borna Gojo (qualified)

• # 🇲🇩 Radu Albot (qualifying competition)

• # 🇯🇵 Yosuke Watanuki (qualified)

• # Antoine Bellier (qualifying competition)

• # 🇹🇷 Altuğ Çelikbilek (qualifying competition)

Qualifiers
• # 🇺🇸 Christopher Eubanks

• # 🇭🇺 Márton Fucsovics

• # 🇯🇵 Yosuke Watanuki

• # Borna Gojo