2024 Oeiras Indoors

The 2024 Oeiras Indoors was a professional tennis tournament played on hard courts. It was the 3rd edition of the tournament which was part of the 2024 ATP Challenger Tour. It took place in Oeiras, Portugal from 1 to 7 January 2024.

Seeds

 * 1 Rankings are as of 25 December 2023.

Other entrants
The following players received wildcards into the singles main draw:
 * João Domingues
 * Jaime Faria
 * Tiago Pereira

The following players received entry into the singles main draw using protected rankings:
 * 🇪🇸 Nicolás Álvarez Varona
 * 🇬🇧 Paul Jubb

The following players received entry from the qualifying draw:
 * 🇬🇧 Jay Clarke
 * 🇫🇷 Kenny de Schepper
 * Egor Gerasimov
 * 🇬🇧 Alastair Gray
 * 🇺🇸 Noah Rubin
 * 🇮🇹 Samuel Vincent Ruggeri

The following player received entry as a lucky loser:
 * 🇺🇦 Vadym Ursu

Singles

 * 🇵🇱 Maks Kaśnikowski def. Gastão Elias 7–6(7–1), 4–6, 6–3.

Doubles

 * 🇬🇧 Jay Clarke / 🇬🇧 Marcus Willis def. 🇫🇷 Théo Arribagé / 🇧🇪 Michael Geerts 6–4, 6–7(9–11), [10–3].