Isabel Cueto is a retired professional tennis player from Germany. Her career-high ranking was No. 20, which she achieved in 1989.
The 1989 Estoril Open was a women's tennis tournament played on outdoor clay courts at the Estoril Court Central in Oeiras, Portugal that was part of the Category 2 tier of the 1989 WTA Tour. It was the first edition of the tournament and was held from 17 July through 23 July 1989. Third-seeded Isabel Cueto won the singles title.
The 1990 Great American Bank Classic was a women's tennis tournament played on outdoor hard courts in San Diego, California, United States, that was part of the Tier III category of the 1991 WTA Tour. It was the 13th edition of the tournament and was held from August 6 through August 12, 1990. First-seeded Steffi Graf won the singles title.
The 1988 Athens Trophy was a women's tennis tournament played on outdoor clay courts at the Athens Lawn Tennis Club in Athens, Greece and was part of Tier V of the 1988 WTA Tour. It was the third edition of the tournament and was held from 1 August until 7 August 1988. First-seeded Isabel Cueto won the singles title and earned $12,000 first-prize money.
The 1989 Vitosha New Otani Open was a women's tennis tournament played on outdoor clay courts in Sofia, Bulgaria that was part of the Category 1 tier of the 1989 WTA Tour. The tournament was held from 31 July until 6 August 1989. Second-seeded Isabel Cueto won the singles title.
The 1987 WTA Argentine Open was a women's tennis tournament played on outdoor clay courts at the Buenos Aires Lawn Tennis Club in Buenos Aires, Argentina and was part of the Category 1 tier of the 1988 Virginia Slims World Championship Series. The tournament ran from 30 November until 6 December 1987. First-seeded Gabriela Sabatini won the singles title.
The 1988 Swedish Open, also known as the Volvo (Ladies) Open was a combined men's and women's tennis tournament played on outdoor clay courts held in Båstad, Sweden and was part of the Grand Prix circuit of the 1988 Tour, as well as the Category 1 tier of the 1988 WTA Tour. It was the 41st edition of the tournament and was held from 11 July through 17 July 1988. Marcelo Filippini won the singles title.
Federica Bonsignori is a former professional tennis player from Italy.
The 1990 Porsche Tennis Grand Prix was a women's tennis tournament played on indoor carpet courts at the Filderstadt Tennis Centre in Filderstadt, Germany and was part of the Tier II of the 1990 WTA Tour. It was the 13th edition of the tournament and was held from 15 October to 21 October 1990. Second-seeded Mary Joe Fernández won the singles title.
The 1990 Lufthansa Cup German Open was a women's tennis tournament played on outdoor clay courts at the Rot-Weiss Tennis Club in West Berlin, West Germany that was part of the Tier I category of the 1990 WTA Tour. It was the 21st edition of the tournament and was held from 14 May until 20 May 1990. Second-seeded Monica Seles won the singles title, snapping world no.1 Steffi Graf's 66-match winning streak in the final.
The 1990 Arizona Classic was a women's tennis tournament played on outdoor hard courts at the Scottsdale Princess in Scottsdale, Arizona in the United States and was part of Tier IV of the 1990 WTA Tour. It was the fifth edition of the tournament and was held from October 15 through October 21, 1990. First-seeded Conchita Martínez won the singles title and earned $27,000 first-prize money.
The 1990 Geneva European Open was a women's tennis tournament played on outdoor clay courts in Geneva, Switzerland that was part of the Tier IV category of the 1990 WTA Tour. It was the 14th edition of the tournament and was held from 21 May until 27 May 1990. Second-seeded Barbara Paulus won the singles title.
The 1990 Citizen Cup was a women's tennis tournament played on outdoor clay courts at the Am Rothenbaum in Hamburg in West Germany that was part of the Tier II category of the 1990 WTA Tour. It was the 13th edition of the tournament and was held from 30 April until 6 May 1990. First-seeded Steffi Graf won the singles title, her fourth consecutive at the event.
The 1987 Citizen Cup was a women's tennis tournament played on outdoor clay courts at the Am Rothenbaum in Hamburg, West Germany and was part of the Category 3 tier of the 1987 Virginia Slims World Championship Series. It was the 10th edition of the tournament and ran from 21 September until 27 September 1987. First-seeded Steffi Graf won the singles title.
The 1990 Jello Tennis Classic was a women's tennis tournament played on indoor hard courts in Indianapolis, Indiana in the United States and was part of the Tier IV category of the 1990 WTA Tour. It was the 11th edition of the tournament and ran from November 5 through November 11, 1990. Second-seeded Conchita Martínez won the singles title and earned $27,000 first-prize money.
The 1990 Puerto Rico Open was a women's tennis tournament played on outdoor hard courts at the Hyatt Regency Cerromar Hotel in San Juan in Puerto Rico that was part of the Tier IV category of the 1990 WTA Tour. It was the eighth edition of the tournament and was held from October 22 through October 27, 1990. Second-seeded Jennifer Capriati won the singles title and earned $27,000 first-prize money.
The 1990 Fernleaf International Classic was a women's tennis tournament played on outdoor hard courts in Wellington, New Zealand and was part of the Tier V category of the 1990 WTA Tour. It was the third edition of the tournament and was held from 5 February until 11 February 1990. Sixth-seeded Wiltrud Probst won the singles title.
The 1993 San Marino Open was a women's tennis tournament played on outdoor clay courts at the Centro Tennis Cassa de Risparmio in the City of San Marino, San Marino that was part of the Tier IV category of the 1993 WTA Tour. It was the third and last edition of the WTA San Marino and was held from 26 July until 1 August 1993. Unseeded Marzia Grossi won the singles title and earned $18,000 first-prize money.
Isabel Cueto was the defending champion, but lost in the quarterfinals to Federica Bonsignori.
This is the first edition of the tournament as part of the WTA Tour. Isabel Cueto won the inaugural title by defeating Barbara Paulus 6–2, 6–3 in the final.
Isabel Cueto 
Laura Garrone / 
Karin Kschwendt 
