2021 Monterrey Open
The 2021 Monterrey Open was a women's tennis tournament played on outdoor hard courts. It was the 13th edition of the Monterrey Open and a WTA 250 tournament on the 2021 WTA Tour. It took place at the Club Sonoma in Monterrey, Mexico, from 15 to 21 March 2021.
Champions
Singles
Leylah Annie Fernandez def. Viktorija Golubic, 6–1, 6–4.This was Fernandez's first WTA tour title.
Doubles
Caroline Dolehide / Asia Muhammad def. Heather Watson / Saisai Zheng 6–2, 6–3.Points and prize money
Prize money
*per teamSingles main draw entrants
Seeds
Other entrants
The following players received wildcards into the main draw:The following player received entry into the singles main draw using a protected ranking:
The following player received entry as a special exempt:
The following players received entry from the qualifying draw:
The following players received entry as lucky losers:
Withdrawals
;Before the tournament- Victoria Azarenka → replaced by Jasmine Paolini
- Marie Bouzková → replaced by Kristína Kučová
- Coco Gauff → replaced by Varvara Gracheva
- Polona Hercog → replaced by Nina Stojanović
- Ons Jabeur → replaced by Anna Karolína Schmiedlová
- Johanna Konta → replaced by Tamara Zidanšek
- Danka Kovinić → replaced by Harriet Dart
- Magda Linette → replaced by Martina Trevisan
- Ajla Tomljanović → replaced by Zhu Lin
Doubles main draw entrants
Seeds
- Rankings as of March 8, 2021.
Other entrants
The following pairs received wildcards into the doubles main draw:Withdrawals
;Before the tournament- Marie Bouzková / Sara Sorribes Tormo → replaced by Paula Kania-Choduń / Katarzyna Piter
- Anna Kalinskaya / Viktória Kužmová → replaced by Greet Minnen / Ingrid Neel