| Date: | 2–7 May |
| Edition: | 3rd |
| Surface: | Clay |
| Location: | Cagliari, Italy |
| Champs: |  Ugo Humbert |
| Champd: |  Alexander Erler / Lucas Miedler |
| Before Year: | 2021 |
The 2023 Sardegna Open was a professional tennis tournament played on clay courts. It was the third edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Cagliari, Italy between 2 and 7 May 2023.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Japan | Yoshihito Nishioka | 34 | 1 | |
 United States | Ben Shelton | 38 | 2 | |
| United States | Mackenzie McDonald | 54 | 3 | |
 Serbia | Laslo Djere | 70 | 4 | |
 Argentina | Diego Schwartzman | 72 | 5 | |
| France | Ugo Humbert | 77 | 6 | |
 Italy | ||||
 Brazil | Thiago Monteiro | 97 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry into the singles main draw as alternates:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
See main article: 2023 Sardegna Open – Singles.
Ugo Humbert def. Laslo Djere 4–6, 7–5, 6–4.See main article: 2023 Sardegna Open – Doubles.
Alexander Erler / Lucas Miedler def. Máximo González / Andrés Molteni 7–6(8–6), 6–3.
