Martinez first competed at the International Racquetball Federation (IRF) Junior World Championships in 2009 in Santo Domingo, Dominican Republic, where she lost to Mary Zeng (USA), 10-15, 15-13, 11-3, in the semi-finals of Girls U10.

She competed in Women's Doubles with Maria Renee Rodriguez, and lost in the Round of 16 to the South Korean team of Malhee Kwon and Mi Ok An, 10-15, 15-14, 11-7.

[4] Martinez and Rodriguez played Women's Doubles at the 2013 Pan American Championships in Cali, Colombia, losing in the round of 16 to Colombians Cristina Amaya and Carline Gomez.

[5] Martinez won girls' U14 singles at the 2013 Junior World Championships in Sucre, Bolivia, defeating Mexican Erin Rivera in the final, 15-9, 15-8.

At the 2014 Junior World Championships in Cali, Colombia, Martinez again won girls' U14 by defeating over Wanda Carvajal of Bolivia in the final, 15-2, 15-9.

[11] Martinez reached the podium at an international event for the first time at the 2014 Central American and Caribbean Games in Veracruz, Mexico, where she was a triple medalist.

[12] In women's doubles in Santo Domingo, Martinez and Rodriguez reached the quarterfinals, but lost to Bolivians Carola Loma and Adriana Riveros, 6-15, 15-7, 11-7.

[14] In 2016, Martinez picked up her first medal at the Pan American Racquetball Championships, as she reached the semi-finals by defeating Michelle Key of the USA in the quarterfinals, 15-7, 10-15, 11-7.

She also played women's doubles at Worlds in Cali, where she and Maria Renee Rodriguez defeated Colombians Cristina Amaya and Caroline Gomez in the round of 16, 13-15, 15-13, 11-8, and then lost to Mexicans Longoria and Salas, 15-2, 15-5, in the quarter-finals.

Perhaps that performance in San Luis Potosi spurred Longoria to partner with Martinez to play LPRT doubles at the 2017 US Open, and they won the title by defeating Cristina Amaya and Adriana Riveros in the final, 15-5, 15-8.

[22] Martinez lost for the first time since 2010 at the World Junior Championships in 2017 in Minneapolis, as Mexican Monserrat Mejia beat her in the final of girls U18 singles, 15-13, 4-15, 11-5.

Martinez and Rodriguez were silver medalists in women's doubles at the 2018 Pan American Championships[24] in Temuco, Chile, where they lost in the final to Mexicans Paola Longoria and Alexandra Herrera, 9-15, 15-1, 11-8.

[25] Martinez also earned a bronze medal in women's singles in Temuco, as she beat Argentina's Natalia Mendez, 15-12, 10-15, 11-2, in the quarter-finals, and then lost to eventual champion Rhonda Rajsich of the USA, 15-13, 15-10.

In women's doubles, Martinez and Rodriguez beat Colombians Cristina Amaya and Adriana Riveros in the semi-finals, 15-12, 12-15, 11-4, and then went breaker with Mexicans Longoria and Samantha Salas, but lost, 9-15, 15-9, 11-5.

However, Martinez and Maria Renee Rodriguez were bronze medalists in women's doubles, as they lost in the semi-finals to Mexicans Paola Longoria and Samantha Salas, 15-9, 15-4.

Martinez was also on the podium at the 2022 Pan American Championships in Santa Cruz de la Sierra, Bolivia, earning bronze in women's singles.

Martinez played mixed doubles with Edwin Galicia in Bolivia, and they lost in the quarter-finals to Bolivians Micaela Meneses and Conrrado Moscoso, 15-10, 15-8, 15-12.

Martinez reached the women's singles final in Birmingham by defeating American Rhonda Rajsich in the quarter-finals, 15-8, 15-9, 15-8, and Mexican Samantha Salas in the semi-finals, 12-15, 15-5, 15-11, 15-7.

[33] She defeated Rhonda Rajsich (USA), 12-10, 11-5, 7-11, 12-10, in the quarter-finals, and Alexandra Herrera (Mexico), 12-10, 11-6, 11-9, in the semi-finals, but lost to Mexican Paola Longoria, 12-10, 11-7, 11-7, in the final.

[35] They reached the final with wins over Chileans Carla Muñoz and Paula Mansilla in the quarter-finals, 11-3, 12-10, 11-7, and Bolivians Angélica Barrios and Jenny Daza in the semi-finals, 11-9, 11-4, 11-5.