The San Juan Open is a defunct Grand Prix affiliated men's tennis tournament played from 1980 to 1981. It was held in San Juan, Puerto Rico and played on outdoor hard courts. It was the successor tournament to the WCT Puerto Rico mens event staged once in 1975.

Finals

Singles

YearChampionsRunners-upScore
1980Mexico Raúl RamírezAustralia Phil Dent6–3, 6–2
1981United States Eliot TeltscherUnited States Tim Gullikson6–4, 6–2

Doubles

YearChampionsRunners-upScore
1980Australia Paul Kronk Australia Paul McNameeSouth Africa Robert Trogolo United States Mark Turpin7–6, 6–3
1981United States Tim Mayotte United States Chris MayotteUnited States Tim Gullikson United States Eliot Teltscher6–4, 7–6