Steffi Graf defeated Gabriela Sabatini in the final, 6–3, 3–6, 6–1 to win the women's singles tennis title at the 1988 US Open. It was her first US Open title and fifth major title overall. With the win, she became the third woman to complete the Grand Slam, after Maureen Connolly and Margaret Court. Moreover, it was the fourth component of her Golden Slam, which remains the only calendar Golden Slam achieved in pedestrian tennis, and Graf completed the career Grand Slam with the win. It was Sabatini's first major final.
Steffi Graf defeated six-time defending champion Martina Navratilova in a rematch of the previous year's final, 5–7, 6–2, 6–1 to win the ladies' singles tennis title at the 1988 Wimbledon Championships. It was her first Wimbledon singles title and fourth major title overall. It was also Graf's third step towards completing the first, and so far only Golden Slam in the history of tennis.
The 1991 Canadian Open was a tennis tournament played on outdoor hard courts. It was the 102nd edition of the Canada Masters, and was part of the ATP Super 9 of the 1991 ATP Tour, and of the Tier I Series of the 1991 WTA Tour. The men's event took place at the Uniprix Stadium in Montreal, Canada from July 22 through July 28, 1991, and the women's event at the National Tennis Centre in Toronto, Ontario, Canada from August 5 through August 11, 1991.
The 1988 U.S. Women's Hard Court Championships was a women's tennis tournament played on outdoor hard courts at the McFarlin Tennis Center in San Antonio, Texas in the United States and was part of the Category 3 tier of the 1988 WTA Tour. It was the 23rd edition of the tournament and was held from February 29 through March 5, 1988. It was the first time the tournament was held since 1969. First-seeded Steffi Graf won the singles title and collected $40,000 first-prize money.
Steffi Graf won in the final 6–4, 6–1 against Katerina Maleeva.
The 1988 Dow Chemical Classic was a women's tennis tournament played on grass courts at the Edgbaston Priory Club in Birmingham in the United Kingdom and was part of the Category 2 tier of the 1988 WTA Tour. It was the seventh edition of the tournament and was held from 6 June until 12 June 1988. Claudia Kohde-Kilsch won the singles title.
The 1989 Virginia Slims of Washington was a women's tennis tournament played on indoor carpet courts at the Patriot Center in Fairfax, Virginia in the United States and was part of the Category 5 tier of the 1989 WTA Tour. The tournament ran from February 13 through February 19, 1989. First-seeded Steffi Graf won the singles title.
The 1989 Virginia Slims of California was a women's tennis tournament played on indoor hard courts at the Oakland-Alameda County Coliseum Arena in Oakland, California in the United States and was part of Category 4 tier of the 1989 WTA Tour. The tournament ran from February 20 through February 26, 1989. Third-seeded Zina Garrison won the singles title.
The 1989 Bausch & Lomb Championships was a women's tennis tournament played on outdoor clay courts at the Amelia Island Plantation on Amelia Island, Florida in the United States that was part of the Category 5 tier of the 1989 WTA Tour. The tournament was held from April 10 through April 16, 1989. Third-seeded Gabriela Sabatini won the singles title.
The 1989 European Open was a women's tennis tournament played on outdoor clay courts at the Drizia-Miremont Tennis Club in Geneva, Switzerland that was part of the Category 2 tier of the 1989 WTA Tour. The tournament was held from 22 May until 28 May 1989. Third-seeded Manuela Maleeva won the singles title.
The 1989 Dow Classic was a women's tennis tournament played on grass courts at the Edgbaston Priory Club in Birmingham in the United Kingdom that was part of the Category 2 tier of the 1989 WTA Tour. It was the 8th edition of the tournament and was held from 12 June until 18 June 1989. First-seeded Martina Navratilova won the singles title.
The 1990 Pilkington Glass Championships was a women's tennis tournament played on grass courts at the Devonshire Park Lawn Tennis Club in Eastbourne in the United Kingdom that was part of Tier II of the 1990 WTA Tour. The tournament was held from 18 June until 24 June 1990. First-seeded Martina Navratilova won the singles title and earned $70,000 first-prize money.
The 1988 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 1988 WTA Tour. The tournament ran from July 25 through July 31, 1988. First-seeded Steffi Graf won the singles title, her second consecutive at the event, and earned $40,000 first-prize money.
The 1988 Vitosha New Otani Open was a women's tennis tournament played on outdoor hard courts in Sofia, Bulgaria and was part of the Category 2 tier of the 1988 WTA Tour. The tournament ran from 8 August until 14 August 1988. Sixth-seeded Conchita Martínez won the singles title and earned $17,000 first-prize money.
Jenny Byrne and Michelle Jaggard were the defending champions but they competed with different partners that year, Byrne with Janine Tremelling and Jaggard with Katerina Maleeva.
The 1990 Dow Classic was a women's tennis tournament played on outdoor grass courts that was part of Tier IV of the 1990 WTA Tour. It was the 9th edition of the event. It took place at the Edgbaston Priory Club in Birmingham, United Kingdom, from 11 June until 17 June 1990. Zina Garrison won the singles title.
The 1987 Family Circle Cup was a women's tennis tournament played on outdoor clay courts at the Sea Pines Plantation on Hilton Head Island, South Carolina in the United States and was part of the Category 4 tier of the 1987 WTA Tour. It was the 15th edition of the tournament and ran from April 6 through April 12, 1987. First-seeded Steffi Graf won her second consecutive singles title at the event and earned $60,000 first-prize money.
The 1989 Virginia Slims of Indianapolis was a women's tennis tournament played on outdoor hard courts in Indianapolis, Indiana in the United States and was part of the Category 2 tier of the 1989 WTA Tour. It was the 10th edition of the tournament and ran from October 30 through November 5, 1989. First-seeded Katerina Maleeva won her second consecutive singles title at the event.
The 1989 Virginia Slims of Chicago was a women's tennis tournament played on indoor carpet courts at the UIC Pavilion in Chicago, Illinois in the United States and was part of the Category 4 tier of the 1989 WTA Tour. It was the 18th edition of the tournament and was held from November 6 through November 12, 1989. Second-seeded Zina Garrison won the singles title.
The 1993 Barilla Indoors was a women's tennis tournament played on indoor carpet courts at the Saalsporthalle Allmend in Zürich in Switzerland and was part of the 1993 WTA Tour. It was the 10th edition of the tournament, which had been upgraded from Tier II to Tier I, and was held from 4 October through 10 October 1993. Third-seeded Manuela Maleeva-Fragnière won the singles title and earned $150,000 first-prize money.
Katerina Maleeva 
Larisa Savchenko 