The 1989 Los Angeles Open was a men's tennis tournament played on outdoor hard courts at the Los Angeles Tennis Center in Los Angeles, California, as part of the 1989 Nabisco Grand Prix. It was the 63rd edition of the tournament and was held from September 18 through September 24, 1989. Fifth-seeded Aaron Krickstein won the singles title.
Aaron Krickstein defeated Michael Chang 2–6, 6–4, 6–2
- It was Krickstein's 2nd title of the year and the 6th of his career.
Martin Davis / Tim Pawsat defeated John Fitzgerald / Anders Järryd 7–5, 7–6
- It was Davis' only title of the year and the 8th of his career. It was Pawsat's 2nd title of the year and the 4th of his career.