[8] Contreras also participated in the 2018 Central American and Caribbean Games with partner Giuliana Olmos taking gold in doubles and silver in team.

She lost to reigning Olympic champion Monica Puig in singles before defeating Team Puerto Rico in doubles with Giuliana Olmos for the gold medal.

After defeating Peru, Mexico beat Team Chile in the semifinals, squaring off to face Paraguay in the finals.

[21][22] At the Pan Pacific Open, Contreras earned her first main-draw qualification in a WTA Tour event and defeated former top-10 player Sofia Kenin.

Contreras was born in San Luis Potosí, Mexico and grew up in Austin, Texas, where she attended Westlake High School.

Her grandfather Francisco Contreras Serrano was a Davis Cup member, a Pan American Games medalist and a Wimbledon semifinalist in mixed doubles.

Only main-draw results in WTA Tour, Grand Slam tournaments, Fed Cup/Billie Jean King Cup and Olympic Games are included in win–loss records.