2024 Oeiras Indoors II

The 2024 Oeiras Indoors II was a professional tennis tournament played on hard courts. It was the 4th edition of the tournament which was part of the 2024 ATP Challenger Tour. It took place in Oeiras, Portugal from 8 to 13 January 2024.

Seeds

 * 1 Rankings are as of 1 January 2024.

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 into the singles main draw as special exempts:
 * Gastão Elias
 * 🇵🇱 Maks Kaśnikowski

The following players received entry from the qualifying draw:
 * 🇷🇴 Marius Copil
 * 🇩🇪 Sebastian Fanselow
 * 🇬🇧 Aidan McHugh
 * Elmer Møller
 * 🇮🇹 Samuel Vincent Ruggeri
 * 🇨🇿 Michael Vrbenský

The following player received entry as a lucky loser:
 * 🇫🇷 Dan Added

Singles

 * Leandro Riedi def. 🇺🇸 Martin Damm 7–6(8–6), 6–2.

Doubles

 * 🇵🇱 Karol Drzewiecki / 🇵🇱 Piotr Matuszewski def. 🇮🇳 Arjun Kadhe / 🇬🇧 Marcus Willis 6–3, 6–4.