The 1989 Monte Carlo Open (also known as the Volvo Monte Carlo Open for sponsorship reasons) was a men's tennis tournament played on outdoor clay courts at the Monte Carlo Country Club in Roquebrune-Cap-Martin in France that was part of the 1989 Nabisco Grand Prix. The tournament was held from 24 April through 30 April 1989.
Alberto Mancini defeated Boris Becker 7–5, 2–6, 7–6, 7–5
- It was Mancini's 1st title of the year and the 3rd of his career.
Tomáš Šmíd / Mark Woodforde defeated Paolo Canè / Diego Nargiso 1–6, 6–4, 6–2
- It was Šmíd's 2nd title of the year and the 62nd of his career. It was Woodforde's 2nd title of the year and the 6th of his career.