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-upScore1980 Raúl Ramírez Phil Dent 6–3, 6–21981 Eliot Teltscher Tim Gullikson 6–4, 6–2
Doubles YearChampionsRunners-upScore1980 Paul Kronk Paul McNamee Robert Trogolo Mark Turpin 7–6, 6–31981 Tim Mayotte Chris Mayotte Tim Gullikson Eliot Teltscher 6–4, 7–6