The 2009 Abierto Mexicano Telcel was a tennis tournament played on outdoor clay courts.

The men's singles draw included David Nalbandian, the 2008 runner-up in this event and winner in Sydney earlier this year; Gaël Monfils, a semifinalist in Doha and Rotterdam earlier this year; Nicolás Almagro, the defending champion; Tommy Robredo, a semifinalist in Viña del Mar and winner of Costa do Sauipe and Buenos Aires earlier this year; Carlos Moyá, a two-time champion of this event; Albert Montañés; José Acasuso, Viña del Mar runner-up and Costa do Sauipe semifinalist earlier this year; and Juan Mónaco.

The women's singles draw included two top 20 players: Dubai champion Venus Williams and Flavia Pennetta, who has reached the final of this event the last five years and won it twice.

Carla Suárez Navarro, 2004 champion Iveta Benešová, Bogotá runner-up Gisela Dulko, Lucie Šafářová, Tathiana Garbin, and Bogotá champion María José Martínez Sánchez were also in the draw.

The following players received wildcards into the main draw: The following players received entry from the qualifying draw: The following players received wildcards into the main draw: The following players received entry from the qualifying draw: Nicolás Almagro defeated Gaël Monfils, 6–4, 6–4 Venus Williams defeated Flavia Pennetta, 6–1, 6–2 František Čermák / Michal Mertiňák defeated Łukasz Kubot / Oliver Marach, 4–6, 6–4, [10–7] Nuria Llagostera Vives / María José Martínez Sánchez defeated Lourdes Domínguez Lino / Arantxa Parra Santonja, 6–4, 6–2