The 2023 Zug Open was a professional tennis tournament played on outdoor clay courts. It was the 2nd edition of the tournament and part of the 2023 ATP Challenger Tour. It took place in Zug, Switzerland between 24 and 30 July 2023.
Singles main draw entrants
Seeds
1 Rankings as of 17 July 2023.
Other entrants
The following players received wildcards into the singles main draw: Mika Brunold Kilian Feldbausch Matteo Gigante
The following players received entry into the singles main draw as alternates: Aziz Dougaz Matheus Pucinelli de Almeida
The following players received entry from the qualifying draw: Rémy Bertola Dylan Dietrich Gianmarco Ferrari Manuel Guinard Tim Handel Ergi Kırkın
Champions
Singles
Arthur Rinderknech def. Joris De Loore 3–6, 6–3, 6–4.
Doubles
Théo Arribagé / Luca Sanchez def. Ergi Kırkın / Dalibor Svrčina 6–3, 7–5.