| 2023 Porto Open | |
|---|---|
| Date | 31 July – 6 August |
| Edition | 3rd |
| Surface | Hard |
| Location | Porto, Portugal |
| Champions | |
| Singles | |
 Luca Nardi | |
| Doubles | |
 Toshihide Matsui / Kaito Uesugi | |
The 2023 Porto Open was a professional tennis tournament played on hard courts. It was the third edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Porto, Portugal between 31 July and 6 August 2023.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 FRA | Quentin Halys | 66 | 1 |
| FRA | Benjamin Bonzi | 107 | 2 |
| FRA | Hugo Grenier | 122 | 3 |
| ITA | Luca Nardi | 154 | 4 |
| ITA | Mattia Bellucci | 175 | 5 |
 USA | Emilio Nava | 177 | 6 |
| FRA | Antoine Escoffier | 191 | 7 |
 LTU | Ričardas Berankis | 199 | 8 |
The following players received wildcards into the singles main draw:
The following player received entry into the singles main draw using a protected ranking:
The following players received entry from the qualifying draw:
Kenny de Schepper 
João Domingues Jaime Faria 
Johannes Härteis Lucas Poullain
Robert Strombachs Luca Nardi def. João Sousa 5–7, 6–4, 6–1. Toshihide Matsui / Kaito Uesugi def. 
Rithvik Choudary Bollipalli / Arjun Kadhe 6–7(5–7), 6–3, [10–5].The 2017 Western & Southern Open was a men's and women's tennis tournament played on outdoor hard courts from August 14–20, 2017. It was a Masters 1000 tournament on the 2017 ATP World Tour and a WTA Premier 5 tournament on the 2017 WTA Tour. The tournament was one of two headline events in the 2017 US Open Series. The 2017 tournament was the 116th men's edition and the 89th women's edition of the Cincinnati Masters. The tournament was held annually at the Lindner Family Tennis Center in Mason, a northern suburb of Cincinnati, in the United States.
The 2019 San Luis Open Challenger Tour was a professional tennis tournament played on hard courts. It was the 26th edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in San Luis Potosí, Mexico between 15 and 21 April 2019.
The 2019 Puerto Vallarta Open was a professional tennis tournament played on hard courts. It was the second edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Puerto Vallarta, Mexico between 29 April and 5 May 2019.
The 2019 Ludwigshafen Challenger is a professional tennis tournament played on clay courts. It is the 1st edition of the tournament which is part of the 2019 ATP Challenger Tour. It takes place in Ludwigshafen, Germany between 1 and 7 July 2019.
The 2019 Western & Southern Open was a men's and women's tennis tournament played on outdoor hard courts from August 12–18, 2019. It was a Masters 1000 tournament on the 2019 ATP Tour and a WTA Premier 5 tournament on the 2019 WTA Tour. The tournament was one of two headline events in the 2019 US Open Series. The 2019 tournament was the 118th men's edition and the 91st women's edition of the Cincinnati Open and took place at the Lindner Family Tennis Center in Mason, Ohio, a northern suburb of Cincinnati, in the United States.
The 2019 Meerbusch Challenger was a professional tennis tournament played on clay courts. It was the seventh edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Meerbusch, Germany, between 12 and 18 August 2019.
The 2019 Firenze Tennis Cup was a professional tennis tournament played on clay courts. It was the second edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Florence, Italy between 23 and 29 September 2019.
The 2021 Serbia Open was a tennis tournament played on outdoor clay courts. It was the 5th and 1st edition of the event for male and female professional tennis players, respectively. It was part of the 2021 ATP Tour and the 2021 WTA Tour and took place in Belgrade, Serbia; in mid-April for men and mid-May for women. A second ATP tournament, called the Belgrade Open, was played in men's singles the week before the French Open.
The 2021 Brest Challenger was a professional tennis tournament played on hard courts. It was the sixth edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Brest, France between 25 and 31 October 2021.
The 2021 Tali Open was a professional tennis tournament played on hard courts. It was the second edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Helsinki, Finland between November 15 and November 21, 2021.
The 2022 Aberto Santa Catarina de Tenis was a professional tennis tournament played on clay courts. It was the eighth edition of the tournament which was part of the 2022 ATP Challenger Tour. It took place in Blumenau, Brazil between 10 and 16 January 2022.
The 2022 BNP Paribas Primrose Bordeaux was a professional tennis tournament played on clay courts. It was the 13th edition of the tournament and part of the 2022 ATP Challenger Tour. It took place in Bordeaux, France between 9 and 15 May 2022.
The 2022 Mallorca Championships was a men's tennis tournament to be played on outdoor grass courts. It was the second edition of the Mallorca Championships, and part of the ATP Tour 250 series of the 2022 ATP Tour. It was held at the Santa Ponsa Tennis Academy in Santa Ponsa, Spain, from 20 June until 26 June 2022.
The 2022 Porto Open was a professional tennis tournament played on hard courts. It was the second edition of the tournament which was part of the 2022 ATP Challenger Tour. It took place in Porto, Portugal between 4 and 10 July 2022.
The 2022 Tampere Open was a professional tennis tournament played on clay courts. It was the 40th edition of the tournament which was part of the 2022 ATP Challenger Tour. It took place in Tampere, Finland, between 18–24 July 2022.
The 2022 NÖ Open was a professional tennis tournament played on clay courts. It was the second edition of the tournament which was part of the 2022 ATP Challenger Tour. It took place in Tulln an der Donau, Austria between 5 and 10 September 2022.
The 2022 Lisboa Belém Open was a professional tennis tournament played on outdoor clay courts. It was the sixth (men) and second (women) editions of the tournament which were part of the 2022 ATP Challenger Tour and the 2022 ITF Women's World Tennis Tour. It took place in Lisbon, Portugal between 26 September and 2 October 2022.
The 2022 São Léo Open was a professional tennis tournament played on clay courts. It was the 3rd edition of the tournament which was part of the 2022 ATP Challenger Tour. It took place in São Leopoldo, Brazil between 14 and 20 November 2022.
The 2022 Maia Challenger was a professional tennis tournament played on clay courts. It was the fifth edition of the tournament which was part of the 2022 ATP Challenger Tour. It took place in Maia, Portugal from 28 November to 4 December 2022.
The 2023 Lisboa Belém Open was a professional tennis tournament played on outdoor clay courts. It was the seventh (men) and third (women) editions of the tournament which were part of the 2023 ATP Challenger Tour and the 2023 ITF Women's World Tennis Tour. It took place in Lisbon, Portugal between 2 and 8 October 2023. It was Pedro Sousa last professional event before he retired.