2021 Los Cabos Open
The 2021 Los Cabos Open was an ATP tennis tournament played on outdoor hardcourt. It was the 5th edition of the tournament, and part of the ATP Tour 250 series of the 2021 ATP Tour. It took place in Los Cabos, Mexico from 19 July through 25 July 2021.
Champions
Singles
Cameron Norrie def. Brandon Nakashima 6–2, 6–2.Doubles
Hans Hach Verdugo / John Isner def. Hunter Reese / Sem Verbeek 5–7, 6–2, .Points and prize money
Prize money
| Event | W | F | SF | QF | Round of 16 | Round of 32 | Q2 | Q1 |
| Singles | €58,705 | €42,095 | €29,965 | €19,975 | €12,840 | €7,730 | €3,775 | €1,960 |
| Doubles* | €21,920 | €15,690 | €10,340 | €6,720 | €3,940 |
*per team
Singles main-draw entrants
Seeds
Other entrants
The following players received wildcards into the main draw:The following players received entry from the qualifying draw:
Withdrawals
- Kevin Anderson → replaced by Elias Ymer
- Ričardas Berankis → replaced by Jurij Rodionov
- Grigor Dimitrov → replaced by Brandon Nakashima
- James Duckworth → replaced by Yasutaka Uchiyama
- Daniel Elahi Galán → replaced by Emilio Gómez
- Egor Gerasimov → replaced by Evgeny Donskoy
- Ilya Ivashka → replaced by Sebastian Ofner
- Sebastian Korda → replaced by Peter Gojowczyk
- Adrian Mannarino → replaced by J. J. Wolf
- Guido Pella → replaced by Alex Bolt
Retirements
Doubles main-draw entrants
Seeds
- 1 Rankings are as of 12 July 2021.
Other entrants
The following pairs received wildcards into the doubles main draw:Withdrawals
;Before the tournament- Marcelo Arévalo / Miguel Ángel Reyes-Varela → replaced by Harri Heliövaara / Miguel Ángel Reyes-Varela
- Ričardas Berankis / Harri Heliövaara → replaced by Sriram Balaji / Luca Margaroli
- Lloyd Glasspool / Cameron Norrie → replaced by Evgeny Donskoy / Illya Marchenko
- Matt Reid / Jordan Thompson → replaced by Alex Bolt / Jordan Thompson