The 2018 Monterrey Open, also known as the Abierto GNP Seguros for sponsorship reasons, was a women's tennis tournament played on outdoor hard courts. It was the 10th edition of the Monterrey Open and an International tournament on the 2018 WTA Tour. It took place at the Club Sonoma in Monterrey, Mexico, from 2 April until 8 April 2018. Firsts-seeded Garbiñe Muguruza won the singles title.
The following players received wildcards into the main draw:
The following players received entry from the qualifying draw:
The following pairs received wildcards into the doubles main draw: