The 1988 Copa Nabisco Royal, also known as the Buenos Aires Grand Prix, was a men's Grand Prix tennis men's tournament held in on outdoor clay courts in Buenos Aires, Argentina.

It was the 20th edition of the tournament and was held from 7 November through 14 November 1988.

Seventh-seeded Javier Sánchez won the singles title.

Javier Sánchez defeated Guillermo Pérez Roldán 6–2, 7–6 Carlos Costa / Javier Sánchez defeated Eduardo Bengoechea / José Luis Clerc 6–3, 3–6, 6–3