Yvonne Vermaak is a former tour tennis player who represented her native South Africa

South Africa

The Republic of South Africa is a country in southern Africa. Located at the southern tip of Africa, it is divided into nine provinces, with of coastline on the Atlantic and Indian oceans...

.

Vermaak's best result was defeating Virginia Wade

Virginia Wade

Sarah Virginia Wade, OBE is a former English tennis player. She won three Grand Slam singles championships and four Grand Slam doubles championships. She won the women's singles championship at Wimbledon on 1 July 1977, in that tournament's centenary year, the last time any Briton has won a...

 in the quarter-finals of the 1983 Wimbledon Championships

1983 Wimbledon Championships

The 1983 Wimbledon Championships was a tennis tournament played on :grass courts at the All England Lawn Tennis and Croquet Club in Wimbledon in London in England...

.

Late in her playing career, Vermaak became an American citizen.

Vermaak played USTA Master's tennis. Representing Illinois

Illinois

Illinois is the fifth-most populous state of the United States of America, and is often noted for being a microcosm of the entire country. With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal,...

, she was the 1992 Singles Champion of the USTA National Women's Indoor Championships in Homewood for 35's. In 1993, Yvonne Vermaak was the 25's Singles Champion, and again she was the 25's Singles Champion in 1994. In 1995, Vermaak moved on to Doubles, winning the 25's and 35's doubles with her partner Ann Kiyomura-Hayashi of California. The 1995 Championships was Vermaak's last USTA Championships win.

Singles 5 (3-2)

Outcome	No.	Date	Tournament	Surface	Opponent	Score
Runner-up	1.	17 September 1978	San Antonio, Texas, USA	Hard	Stacy Margolin	5-7, 1-6
Runner-up	2.	11 January 1982	Fort Myers, Florida, USA	Hard	Duk-Hee Lee	0-6, 3-6
Winner	3.	6 March 1983	Palm Springs Palm Springs Palm Springs is a desert city in CaliforniaPalm Springs may also refer to:* Palm Springs, Florida* Palm Springs, Hong Kong, a residential development in Yuen Long, Hong Kong* Coachella Valley, also known as the Palm Springs area... , California, USA	Hard	Carling Bassett	6-3, 7-5
Winner	4.	19 September 1983	Salt Lake City, Utah, USA	Hard	Felicia Raschiatore	6-2, 0-6, 7-5
Winner	5.	16 September 1984	Salt Lake City, Utah, USA	Hard	Terry Holladay Terry Holladay Terry Holladay is an American former professional tennis player who played between 1974 and 1987, reaching the quarter finals of both the U.S...	6-1, 6-2

Doubles 7 (4-3)

Titles by Surface
Hard	2
Clay	2
Grass	0
Carpet	0

Outcome	No.	Date	Tournament	Surface	Partner	Opponents	Score
Runner-up	1.	16 June 1978	Chichester Chichester Chichester is a cathedral city in West Sussex, within the historic County of Sussex, South-East England. It has a long history as a settlement; its Roman past and its subsequent importance in Anglo-Saxon times are only its beginnings... , England	Grass	Michelle Tyler	Janet Wright Janet Wright Janet Wright is a Canadian actress and theatre director. She is best known for her role as Emma Leroy on the hit Canadian sitcom Corner Gas. She won a 2003 Gemini Award for Best Performance by an Actress in a Featured Supporting Role in a Dramatic Program or Mini-Series for her role in Betrayed...     Pam Shriver Pam Shriver Pamela Howard Shriver Lazenby , is a former professional tennis player and is currently a sports broadcaster from the United States for ESPN2. During the 1980s and 1990s, she won 133 top-level titles, including 21 women's doubles titles and one mixed doubles title at Grand Slam tournaments...	6-3, 3-6, 4-6
Runner-up	2.	19 July 1981	Kitzbühel Gastein Ladies Nürnberger Gastein Ladies is a tennis tournament held in Bad Gastein, Austria since 2007. It is an International event on the WTA Tour with total prize money of $220,000 and is played on red clay.-Singles:-Doubles:- External links :* *... , Austria	Clay	Elizabeth Little	Claudia Kohde-Kilsch Claudia Kohde-Kilsch Claudia Kohde-Kilsch is a former German tennis player. During her career, she won two women's doubles Grand Slam titles. She also won 10 singles titles and 26 doubles titles.-Career:...     Eva Pfaff Eva Pfaff Eva Pfaff is a former German tennis player.During her career she won 5 doubles WTA titles. Her peak world rankings in the sport were 17th in singles and 16th in doubles ....	4-6, 3-6
Winner	3.	9 May 1982	Perugia Perugia Perugia is the capital city of the region of Umbria in central Italy, near the River Tiber, and the capital of the province of Perugia. The city is located about north of Rome. It covers a high hilltop and part of the valleys around the area.... , Italy	Clay	Kathy Horvath	Billie Jean Billie Jean "Billie Jean" is a dance-pop/R&B song by American recording artist Michael Jackson. It was written, composed, and co-produced by Jackson, and produced by Quincy Jones from the singer's sixth album, Thriller . Originally disliked by Jones, the track was almost removed from the album after he and...     Ilana Kloss Ilana Kloss Ilana Sheryl Kloss is a former professional tennis player and the commissioner of World Team Tennis.-Tennis career:Kloss was born in Johannesburg, South Africa. Before turning professional, in 1972 she won the Wimbledon juniors singles title. In 1974 she won U.S...	2-6, 6-4, 7-6
Runner-up	4.	6 November 1982	Hong Kong Hong Kong Hong Kong is one of two Special Administrative Regions of the People's Republic of China , the other being Macau. A city-state situated on China's south coast and enclosed by the Pearl River Delta and South China Sea, it is renowned for its expansive skyline and deep natural harbour...	Clay	Jennifer Mundel	Laura Du Pont    Alycia Moulton Alycia Moulton Alycia Moulton is a former professional tennis player.Moulton was active on the WTA tour from 1978 to 1988. Her powerful game brought her two singles title in 1983 and five doubles titles. She twice defeated Helena Suková in an overall 76-99 career singles record...	2-6, 6-4, 5-7
Winner	5.	19 September 1983	Salt Lake City, Utah, USA	Hard	Claudia Monteiro Claudia Monteiro Claudia Monteiro is a Brazilian professional tennis player.-External links:...	Amanda Brown    Brenda Remilton	6-1, 3-6, 6-4
Winner	6.	5 February 1984	Indianapolis Indianapolis Indianapolis is the capital of the U.S. state of Indiana, and the county seat of Marion County, Indiana. As of the 2010 United States Census, the city's population is 839,489. It is by far Indiana's largest city and, as of the 2010 U.S... , Indiana, USA	Hard	Claudia Monteiro Claudia Monteiro Claudia Monteiro is a Brazilian professional tennis player.-External links:...	Beverly Mould    Elizabeth Sayers	6-7, 6-4, 7-5
Winner	7.	6 April 1984	Miami, Florida, USA	Clay	Patricia Medrado	Kate Latham Kate Latham Kate Latham is a former professional tennis player. She competed in Grand Slam tournaments from 1973 to 1984.-External links:...     Janet Wright Janet Wright Janet Wright is a Canadian actress and theatre director. She is best known for her role as Emma Leroy on the hit Canadian sitcom Corner Gas. She won a 2003 Gemini Award for Best Performance by an Actress in a Featured Supporting Role in a Dramatic Program or Mini-Series for her role in Betrayed...	6-3, 6-3